
| Search Engine: |
| Obadiah Stane |
| Obliterator |
| Occulus |
| Oddball |
| Ogre I |
| Ogre II |
| Ogress |
| Omega |
| Omega Red |
| Onslaught |
| The Orb |
| The Organizer |
| Orka |
| Orphan-Maker |
| Overdrive |
| Over-Mind |
| Override |
| Owl |
| Ox I |
| Ox III |
| Ox IV |
| Jackal |
| Jack O'Lantern I |
| Jaeger |
| Jamie Braddock |
| Janus |
| Jerry Jaxon |
| Jester I |
| Jester II |
| Jetstream |
| Jigsaw |
| Jink Slater |
| Jonathan Tremont |
| Joyboy |
| Joystick |
| Juggernaut |
| Justin Hammer |
| Icemaster |
| Igor |
| Immortus |
| Impala |
| Imperial Hydra |
| Impossible Man |
| Impulse |
| Inheritor |
| Invincible Man I |
| Ion |
| Inferno |
| Ironclad |
| Iron Cross |
| Iron Maiden |
| Iron Monger I |
| Iron Patriot |
| Nagala |
| Nanny |
| N'Astirh |
| Nebula |
| Necrodamus |
| Needle |
| Nekra |
| New Sun |
| N'Garai |
| Ngh the Unspeakable |
| Nicholas Scratch |
| Nightmare |
| Nightshade |
| Nimrod |
| Nitro |
| Nuke |
| Vakume |
| Vanessa Fisk |
| Vanisher |
| Vapor |
| Vargas |
| Vector |
| Venom I |
| Venom II |
| Venom III |
| Veranke |
| Vermin |
| Vertigo |
| Vibro |
| Vindaloo |
| Viper I |
| Viper II |
| Virgo I |
| The Void |
| Volcana |
| Vulcan |
| Vulture |
| Vulture II |
| Ulik |
| U.L.T.I.M.A.T.U.M. |
| Ultimate Spider-Slayer |
| Ultimo |
| Ultron |
| U-Man |
| Umar |
| U-Men |
| Uncegila |
| Unicorn |
| Unspoken |
| Unuscione |
| Unus the Untouchable |
| Urthona |