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
- Oatmeal
- only
- Oxygen
- Otter
- Okey
- okay
- Our
- officer
- Orchestra
- Oral
- Odd
- Orangutan
- Opening
- opposite
- offer
- Oats
- Orc
- orca
- Older
- organ
- Olive oil
- Oscar
- Ocular
- Organization
- Outlet
- Opal
- Oreo
- olives
- Okno
- Outside
- operator
- Olivia
- Option
- ore
- obstacle
- Oak wood
- omen
- Overthinking
- oh my god
- original
- o'block
- own
- omega
- Ointment
- orange juice
- obesity
- Ogre
- Optimist
- Ozone
- omlette
- Obviously
- Oath
- Orb
- Ork
- Ornitology
- Oklahoma
- ono
- Optitian
- Oculus
- Ordinary
- Obvious
- Opinion
- Ombre
- Occasion
- Omlet
The words in the list Rzeczownik z ang. na O come from players of the word game City, Country, River.