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