Superhero name with O

• Odin

  Marvel god character from Asgard

• Optimus Prime

  Leader of Autobots from Transformers

• Oblivion

  Marvel cosmic entity

• Omni man

  Variant spacing, same as Omni-Man

• Orion

  DC New God superhero

• One punch man

  Anime hero with unbeatable punch

• Omniman

  Hero from Invincible series

• Oracle

  DC hero identity of Barbara Gordon

• Octoman

  Lesser-known comic book superhero

• oliver queen

  Real name of DC’s Green Arrow

• Obliterator

  Marvel alien character

• One Punch Man

  Anime hero with unbeatable punch

• Octavius

  Marvel villain Doctor Octopus’s real name

• Okoye

  Marvel hero from Black Panther's Dora Milaje.

• Omega Red

  Marvel supervillain from X-Men; widely known name.

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• Ozymandias

  Watchmen character (DC); a known superhero alias.

• Owlman

  DC supervillain; well-known name from comics.

• Osiris

  Yes! Osiris is a DC Comics hero.

• Owlette

  Yes! Owlette is a hero from PJ Masks.

• Onyx

  Yes! Onyx is a DC Comics superheroine.

• omen

  Yes! Omen is a DC Comics superheroine.

• Orpheus

  Yes! DC Comics vigilante named Orpheus.

• Orphan

  Yes! DC Comics hero codename for Cassandra Cain.

• Osmosis jones

  Animated hero from Osmosis Jones—counts!

• Obsidian

  DC superhero from Infinity Inc.—valid pick!

• Opal

  Opal from Steven Universe is a heroic, powered character

• Odinson

  Yes! Used for Thor in Marvel, so it counts.

The words in the list Superhero name with O come from players of the word game Categories game.