Kaare Andrews Interlocking Party Variant Cover (2018)
Immortal Hulk #1.CV6 (2018/08)
Thor (IX) #1.CV5 (2018/08)
Tony Stark: Iron Man #1.CV5 (2018/08)
The Kamchatkan Konspiracy (1991)
Kang War II (1975)
Keemia's Castle (2010)
Keep Your Friends Close
Keepsake (1993)
The Kids Are Alright (2008)
1/3NYX: No Way Home #1.FT4 (2008/10)
2/3NYX: No Way Home #2.FT1 (2008/11)
3/3NYX: No Way Home #3.FT1 (2008/12)
Kill Matsu'o (2010)
1/4Psylocke #1.1 (2010/01)
...® X-Men: Psylocke (TPB) #1.1 (2010/07)
2/4Psylocke #2.1 (2010/02)
...® X-Men: Psylocke (TPB) #1.2 (2010/07)
3/4Psylocke #3.1 (2010/03)
...® X-Men: Psylocke (TPB) #1.3 (2010/07)
4/4Psylocke #4.1 (2010/04)
...® X-Men: Psylocke (TPB) #1.4 (2010/07)
Kill or Cure (2008-2009)
Killable (2013-2014)
1/6Wolverine (VI) #8.1 (2013/10)
...® Wolverine TPB (III) #2.2 (2014/05)
2/6Wolverine (VI) #9.1 (2013/11)
...® Wolverine TPB (III) #2.3 (2014/05)
3/6Wolverine (VI) #10.1 (2013/12)
...® Wolverine TPB (III) #2.4 (2014/05)
4/6Wolverine (VI) #11.1 (2014/01)
...® Wolverine TPB (III) #2.5 (2014/05)
5/6Wolverine (VI) #12.1 (2014/02)
...® Wolverine TPB (III) #2.6 (2014/05)
6/6Wolverine (VI) #13.1 (2014/03)
...® Wolverine TPB (III) #2.7 (2014/05)
Killed in Action (2008)
Killed, Not Dead (2010)
Killer Instinct (2018)
1/6Domino (III) #1.1 (2018/06)
...® Domino TPB (II) #1.1 (2018/12)
2/6Domino (III) #2.1 (2018/07)
...® Domino TPB (II) #1.2 (2018/12)
3/6Domino (III) #3.1 (2018/08)
...® Domino TPB (II) #1.3 (2018/12)
4/6Domino (III) #4.1 (2018/09)
...® Domino TPB (II) #1.4 (2018/12)
5/6Domino (III) #5.1 (2018/10)
...® Domino TPB (II) #1.5 (2018/12)
6/6Domino (III) #6.1 (2018/11)
...® Domino TPB (II) #1.6 (2018/12)
Killer Instincts (2007)
A Killer of a Love Story (1994-1995)
1/4Nightmare #1.1 (1994/12)
2/4Nightmare #2.1 (1995/01)
3/4Nightmare #3.1 (1995/02)
4/4Nightmare #4.1 (1995/03)
The Killing Dream (2010-2011)
1/3X-23 (III) #1.1 (2010/11)
...® X-23 Premiere (HC) #1.1 (2011/06)
...® X-23 TPB (I) #1.1 (2011/12)
...® X-23 TPB: The Complete Collection #1.15 (2016/09)
2/3X-23 (III) #2.1 (2010/12)
...® X-23 Premiere (HC) #1.2 (2011/06)
...® X-23 TPB (I) #1.2 (2011/12)
...® X-23 TPB: The Complete Collection #1.16 (2016/09)
3/3X-23 (III) #3.1 (2011/01)
...® X-23 Premiere (HC) #1.3 (2011/06)
...® X-23 TPB (I) #1.3 (2011/12)
...® X-23 TPB: The Complete Collection #1.17 (2016/09)
The Killing Field (1994)
1/3Cable (I) #9.1 (1994/03)
...® Cable Classic TPB #2.5 (2009/09)
...® Cable and X-Force Omnibus (HC) #1.15 (2019/05)
2/3Cable (I) #10.1 (1994/04)
...® Cable Classic TPB #2.6 (2009/09)
...® Cable and X-Force Omnibus (HC) #1.16 (2019/05)
3/3Cable (I) #11.1 (1994/05)
...® Cable Classic TPB #2.7 (2009/09)
...® Cable and X-Force Omnibus (HC) #1.17 (2019/05)
Killing Ground (1992)
The Killing Season (2005)
The Killing Stroke (1991)
1/3The New Mutants Annual #7.2 (1991)
...® Essential X-Men #11.21 (2013/02)
...® X-Force Omnibus (HC) #1.8 (2013/04)
...® X-Men Epic Collection TPB #19.17 (2018/01)
2/3Uncanny X-Men Annual (I) #15.2 (1991)
...® Essential X-Factor #5.21 (2013/02)
...® Essential X-Men #11.10 (2013/02)
...® X-Force Omnibus (HC) #1.9 (2013/04)
...® X-Men Epic Collection TPB #19.2 (2018/01)
3/3X-Factor Annual #6.2 (1991)
...® Essential X-Factor #5.22 (2013/02)
...® Essential X-Men #11.19 (2013/02)
...® X-Force Omnibus (HC) #1.10 (2013/04)
...® X-Men Epic Collection TPB #19.18 (2018/01)
King Hyperion (2004)
1/3Exiles (I) #38.1 (2004/02)
...® Exiles TPB (I) #7.1 (2004/09)
...® Exiles TPB: Ultimate Collection #3.1 (2010/02)
2/3Exiles (I) #39.1 (2004/02)
...® Exiles TPB (I) #7.2 (2004/09)
...® Exiles TPB: Ultimate Collection #3.2 (2010/02)
3/3Exiles (I) #40.1 (2004/03)
...® Exiles TPB (I) #7.3 (2004/09)
...® Exiles TPB: Ultimate Collection #3.3 (2010/02)
King Leon (1992-1993)
1/3A1 #2.5 (1992)
2/3A1 #3.5 (1993)
3/3A1 #4.1 (1993)
[King of Fang and Claw] (1939-1940)

Quote from Wikipedia.com:
"...Ka-Zar the Great, who first appeared in the pulp magazine Ka-Zar #1 (Oct. 1936) from Manvis Publishing, one of many magazine companies owned by Martin Goodman. Writer-artist Ben Thompson adapted the pulp story "King of Fang and Claw" by Bob Byrd for Goodman's first comic book, Marvel Comics #1 (Oct. 1939)"
More details about Ka-Zar's pre-Marvel days can be found on Don Markstein's Toonopedia.

1/5Marvel Comics #1.6 (1939/10)
...® Marvel Comics (1990 Reprint) #1.6 (1990)
...® Wizard Ace Edition: Marvel Comics (Wizard Publication) #1.3 (1997)
...® Marvel Masterworks: Golden Age of Marvel Comics (HC) #1.6 (2004/11)
...® Golden Age Marvel Comics Omnibus (HC) #1.6 (2009/08)
...® Marvel Comics 70th Anniversary Edition #1.6 (2009/10)
...® Marvel Masterworks: Golden Age of Marvel Comics TPB #1.6 (2012/02)
...® Marvel Firsts TPB: WWII Super Heroes #1.6 (2013/03)
...® Marvel Comics 80th Anniversary Edition (HC) #1.6 (2019/06)
...® Marvel Comics 80th Anniversary Edition (HC) #1.14 (2019/06)
2/5Marvel Mystery Comics (I) #2.6 (1939/12)
...® Marvel Masterworks: Golden Age of Marvel Comics (HC) #1.12 (2004/11)
...® Golden Age Marvel Comics Omnibus (HC) #1.12 (2009/08)
...® Marvel Masterworks: Golden Age of Marvel Comics TPB #1.12 (2012/02)
3/5Marvel Mystery Comics (I) #3.6 (1940/01)
...® Marvel Masterworks: Golden Age of Marvel Comics (HC) #1.18 (2004/11)
...® Golden Age Marvel Comics Omnibus (HC) #1.18 (2009/08)
...® Marvel Masterworks: Golden Age of Marvel Comics TPB #1.18 (2012/02)
4/5Marvel Mystery Comics (I) #4.7 (1940/02)
...® Marvel Masterworks: Golden Age of Marvel Comics (HC) #1.25 (2004/11)
...® Golden Age Marvel Comics Omnibus (HC) #1.25 (2009/08)
...® Marvel Masterworks: Golden Age of Marvel Comics TPB #1.25 (2012/02)
...® Marvel Firsts TPB: WWII Super Heroes #1.50 (2013/03)
5/5Marvel Mystery Comics (I) #5.7 (1940/03)
...® Marvel Masterworks: Golden Age of Marvel Comics (HC) #2.7 (2006/05)
...® Golden Age Marvel Comics Omnibus (HC) #1.32 (2009/08)
...® Marvel Masterworks: Golden Age of Marvel Comics TPB #2.7 (2014/02)
The King of Hell (2019-2020)
1/4Ghost Rider (VIII) #1.1 (2019/12)
...® Ghost Rider Director's Cut Edition #1.1 (2020/02)
...® Ghost Rider TPB (III) #1.1 (2020/05)
2/4Ghost Rider (VIII) #2.1 (2020/01)
...® Ghost Rider TPB (III) #1.3 (2020/05)
3/4Ghost Rider (VIII) #3.1 (2020/02)
...® Ghost Rider TPB (III) #1.4 (2020/05)
4/4Ghost Rider (VIII) #4.1 (2020/03)
...® Ghost Rider TPB (III) #1.5 (2020/05)
The King of Hell's Kitchen (2004)
King of Nothing (2018)
King of the Savage Land (2011)
Kingbreaker (2009)
Kingdom on an Island of the Apes (1975)
1/2Planet of the Apes #9.1 (1975/06)
2/2Planet of the Apes #10.1 (1975/07)
Kingpin (2010)
Kingpin Interlocking Variant Cover (2017)
Kingpin (III) #1.CV3 (2017/04)
The Kingpin of Wakanda (2012)
Kingpins of New York (2017-2018)
1/5Defenders (V) #6.1 (2017/12)
...® Defenders TPB #2.1 (2018/07)
2/5Defenders (V) #7.1 (2018/01)
...® Defenders TPB #2.3 (2018/07)
3/5Defenders (V) #8.1 (2018/02)
...® Defenders TPB #2.4 (2018/07)
4/5Defenders (V) #9.1 (2018/03)
...® Defenders TPB #2.5 (2018/07)
5/5Defenders (V) #10.1 (2018/04)
...® Defenders TPB #2.6 (2018/07)
Kings and Queens (2018)
1/2X-Men: Blue #31.1 (2018/09)
...® X-Men TPB: Blue #5.3 (2018/12)
2/2X-Men: Blue #32.1 (2018/09)
...® X-Men TPB: Blue #5.4 (2018/12)
Kings of Pain (1991)
1/4The New Mutants Annual #7.1 (1991)
...® New Warriors Classic TPB #2.5 (2010/06)
...® Essential X-Men #11.20 (2013/02)
...® X-Force Omnibus (HC) #1.4 (2013/04)
...® The New Warriors Omnibus (HC) #1.27 (2013/07)
2/4The New Warriors Annual #1.1 (1991)
...® New Warriors Classic TPB #2.6 (2010/06)
...® X-Force Omnibus (HC) #1.5 (2013/04)
...® The New Warriors Omnibus (HC) #1.28 (2013/07)
3/4Uncanny X-Men Annual (I) #15.1 (1991)
...® New Warriors Classic TPB #2.7 (2010/06)
...® Essential X-Factor #5.19 (2013/02)
...® Essential X-Men #11.9 (2013/02)
...® X-Force Omnibus (HC) #1.6 (2013/04)
...® The New Warriors Omnibus (HC) #1.29 (2013/07)
...® X-Men Epic Collection TPB #19.1 (2018/01)
4/4X-Factor Annual #6.1 (1991)
...® New Warriors Classic TPB #2.8 (2010/06)
...® Essential X-Factor #5.20 (2013/02)
...® Essential X-Men #11.18 (2013/02)
...® X-Force Omnibus (HC) #1.7 (2013/04)
...® The New Warriors Omnibus (HC) #1.30 (2013/07)
Kings of the Night (1979)
Kirby 100th Anniversary Variant Cover (2017-2018)
Kirby Monster Variant Cover (2015-2016)
House of M (II) #3.CV2 (2015/11)Fin Fang Foom (Strange Tales (I) #89)
A-Force (I) #5.CV2 (2015/12)Ulvar (Journey into Mystery (I) #63)
All-New, All-Different Point One #1.CV4 (2015/12)Nezarr the Calculator (The Eternals (I) #7)
The Amazing Spider-Man (V) #2.CV3 (2015/12)Infant Terrible (Fantastic Four (I) #24)
The Astonishing Ant-Man #1.CV5 (2015/12)Scarlet Beetle (Tales to Astonish (I) #39)
Avengers (VII) #0.CV4 (2015/12)Devil Dinosaur (Devil Dinosaur #1)
Captain America: Sam Wilson #2.CV3 (2015/12)Zetora (Journey into Mystery (I) #57)
Captain America: White #3.CV2 (2015/12)Jinni Demon (Thor (I) #137)
Civil War (II) #5.CV2 (2015/12)Lo-Karr, Bringer of Doom (Journey into Mystery (I) #75)
Contest of Champions (III) #1.CV9 (2015/12)Xemnu the Titan (Journey into Mystery (I) #62)
Doctor Strange (IV) #1.CV11 (2015/12)Awesome Android (Fantastic Four (I) #15)
Groot #5.CV2 (2015/12)Quonian (Fantastic Four (I) #97)
Guardians of the Galaxy (IV) #1.CV10 (2015/12)Groot (Tales to Astonish (I) #13)
House of M (II) #4.CV2 (2015/12)Kraa the Unhuman (Tales of Suspense (I) #18)
Howling Commandos of S.H.I.E.L.D. #1.CV3 (2015/12)Orrgo the Unconquerable (Strange Tales (I) #90)
Invincible Iron Man (VIII) #2.CV2 (2015/12)Fin Fang Foom (Strange Tales (I) #89)
Karnak #1.CV8 (2015/12)Rommbu (Tales to Astonish (I) #19)
Ms. Marvel (III) #19.CV2 (2015/12)Wrecker’s Robot (Fantastic Four (I) #12)
New Avengers (IV) #2.CV2 (2015/12)The Blip (Tales to Astonish (I) #15)
S.H.I.E.L.D. (III) #11.CV2 (2015/12)Poker Face (Strange Tales of the Unusual #7)
Spider-Gwen (II) #1.CV9 (2015/12)Hypno-Creature (Tales of Suspense (I) #23)
Spider-Man 2099 (III) #2.CV2 (2015/12)The Crawling Creature (Tales to Astonish (I) #22)
The Unbeatable Squirrel Girl (II) #1.CV4 (2015/12)Thorr (Tales to Astonish (I) #16)
Uncanny Avengers (III) #1.CV6 (2015/12)Mangog (Thor (I) #154)
Uncanny Inhumans #1.CV11 (2015/12)Vandoom’s Monster (Tales to Astonish (I) #17)
All-New, All-Different Avengers #1.CV9 (2016/01)Googam Son of Goom
All-New Hawkeye (II) #1.CV4 (2016/01)Elektro (Tales of Suspense (I) #13)
Extraordinary X-Men #2.CV2 (2016/01)Yeti (The Black Panther (I) #5)
Illuminati #1.CV4 (2016/01)Monster at the Window
All-New X-Men (II) #1.CV4 (2016/02)
Kiss or Kill (2010-2011)
Kiss Today Goodbye (2013)
Kitchen Irish (2004)
The Kith Triology (2000)
Klaw Stands Supreme (2017-2018)
1/4Black Panther (VII) #166.1 (2017/12)
...® Black Panther TPB #5.1 (2018/06)
...® Black Panther (HC) #2.7 (2019/01)
2/4Black Panther (VII) #167.1 (2018/01)
...® Black Panther TPB #5.3 (2018/06)
...® Black Panther (HC) #2.9 (2019/01)
3/4Black Panther (VII) #168.1 (2018/02)
...® Black Panther TPB #5.4 (2018/06)
...® Black Panther (HC) #2.10 (2019/01)
4/4Black Panther (VII) #169.1 (2018/03)
...® Black Panther TPB #5.5 (2018/06)
...® Black Panther (HC) #2.11 (2019/01)
Knights of Suffering (2007)
Knights of the Old Republic: War (2012)
Know Fear (2019)
Knowhere (2008)
The Korvac Quest (1991)
Kraven's First Hunt (2008)
Kraven's Last Hunt (1987)
1/6Web of Spider-Man (I) #31.1 (1987/10)
...® Spider-Man TPB: Kraven's Last Hunt #1.1 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.1 (2006/10)
...® Spider-Man: With Great Power Comes Great Responsibility #5.1 (2011/10)
...® Essential Web of Spider-Man #2.13 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.12 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.4 (2018/06)
...® Marvel's Greatest Creators: Spider-Man - Kraven's Last Hunt #1.1 (2019/07)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.1 (2021/03)
2/6The Amazing Spider-Man (I) #293.1 (1987/10)
...® Spider-Man TPB: Kraven's Last Hunt #1.2 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.2 (2006/10)
...® Essential Web of Spider-Man #2.16 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.5 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.2 (2018/06)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.2 (2021/03)
3/6Peter Parker, the Spectacular Spider-Man (I) #131.1 (1987/10)
...® Spider-Man TPB: Kraven's Last Hunt #1.3 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.3 (2006/10)
...® Essential Web of Spider-Man #2.18 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.14 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.6 (2018/06)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.3 (2021/03)
4/6Web of Spider-Man (I) #32.1 (1987/11)
...® Spider-Man TPB: Kraven's Last Hunt #1.4 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.4 (2006/10)
...® Essential Web of Spider-Man #2.14 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.13 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.5 (2018/06)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.4 (2021/03)
5/6The Amazing Spider-Man (I) #294.1 (1987/11)
...® Spider-Man TPB: Kraven's Last Hunt #1.5 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.5 (2006/10)
...® Essential Web of Spider-Man #2.17 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.6 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.3 (2018/06)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.5 (2021/03)
6/6Peter Parker, the Spectacular Spider-Man (I) #132.1 (1987/11)
...® Spider-Man TPB: Kraven's Last Hunt #1.6 (1990)
...® Spider-Man Premiere (HC): Kraven's Last Hunt #1.6 (2006/10)
...® Essential Web of Spider-Man #2.19 (2012/09)
...® Amazing Spider-Man Epic Collection TPB #17.15 (2017/07)
...® Spider-Man Deluxe Edition (HC): Kraven's Last Hunt #1.7 (2018/06)
...® Spider-Man (HC): Kraven's Last Hunt (Marvel Select) #1.6 (2021/03)
Kraven's Next Hunt (2011)