Rzeczownik z ang. na O
- Orange
- Owl
- Oil
- Octopus
- Onion
- Oak
- Oven
- object
- office
- Olive
- Ostrich
- Order
- Ocean
- Orgasm
- Open
- October
- Oat
- one
- Oval
- Out
- Oyster
- Opera
- owen
- Ornament
- Orphan
- Other
- Old
- Owner
- Oracle
- Opportunity
- Opium
- Oman
- Over
- Online
- Opener
- Okey
- Otter
- Oxygen
- only
- Oatmeal
- okay
- Our
- officer
- Outlet
- Orchestra
- Orangutan
- Oral
- Odd
- Opening
- opposite
- offer
- Oats
- Orc
- olive oil
- orca
- Older
- Opal
- organ
- Ocular
- Oscar
- Organization
- Oreo
- olives
- Option
- omen
- Okno
- Outside
- operator
- orange juice
- ore
- Oak wood
- Olivia
- obstacle
- obesity
- Overthinking
- original
- oh my god
- o'block
- Obvious
- omega
- own
- Ointment
- Optimist
- Oklahoma
- Ork
- Obviously
- Orb
- Oath
- Ornitology
- omlette
- Ozone
- old man
- Oculus
- ono
- Ordinary
- Optitian
- Ogre
- Oclock
- Occasion
- Ombre
Kata-kata dalam daftar Rzeczownik z ang. na O berasal dari pemain permainan kata ABC Lima Dasar.