Villain with O
- Ogre
- Otto Octavius
- Octavious
- Osama bin laden
- Octavius
- Odin
- Overlord
- Omniman
- Omni man
- Omega
- Oblivion
- Orochimaru
- OJ Simpson
- Ozymandias
- onceler
- Otto
- Orion
- Otto octavious
- osborn
- Orc
- Osborne
- Orcs
- Obito
- Oliver
- Osama
- Ozai
- Octavian
- othello
- Oracle
- octoman
- Oberon
- oswald cobblepot
- Ophelia
- Odd Job
- Onslaught
- Obadiah Stane
- Omega red
- octo octavius
- Oddjob
- orange
- O'hare
- Oman
- Oogie Boogie
- Octavio
- Orange man
- Oger
- Octopus Doctor
- Obliterator
- Orson
- Oculus
- Ogres
- oedipus
- Octavios
- octavia
- Omicron
- Omarosa
- ozzy
- Oli London
- Ocean
- OSCAR
- ock
- octupus
- orpheus
- owen
- Octavias
- oliver twist
- Octane
- Owlman
- olive
- Oddball
- odile
- Owl man
- Osbourne
- Ohio
- Otto Octavias
- Om puri
- Orangutan man
- orson welles
- Outsider
- Opps
- Octopi
- Oni
- Ostrich
- Otello
- Ogar
- orlando
- Orca
- Orochi
- Ork
- Opal
- Otto Von Bismark
- Ozark
- Outlander
- Ollie
- Oligarchs
- Oh no
- Omkara
- oclin
- Ojoker
The words in the list Villain with O come from players of the word game Categories game.