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