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