O
- Ō kawekawe
- O te moana
- Oaths of allegiance
- Oaths, Loyalty
- Oati piripono
- Obituaries
- Obligations, Mutual
- Observers
- Obsidian
- Obstetrics
- Occupations (Protests)
- Ocean navigation
- Ocean waves
- Ocean-going canoes
- Octopuses
- Offences
- Offenders
- Officers, Police
- Ōhākī
- Ōhanga
- Ōhanga whanaketanga
- Ohaoha
- Ōi
- Oils, Essential
- Oioi
- Oioi o Papatūānuku
- Old man's beard lichens
- Old Testament
- Omens
- Omens, Bad
- Omens, Good
- Ōmu
- One
- Oneone
- Onepū
- Oneroa
- Onetū
- Ongaonga
- Onioni
- Online resources
- Online safety
- Ono rākau
- Ōpango
- Opening ceremonies
- Opera
- Opossums
- Opponents
- Opposites
- Ora
- Oral health
- Oral histories
- Oranges, Māori
- Orators
- Oratory
- Orca
- Orchestras
- Orchestras, Chamber
- Orchestras, Philharmonic
- Orchestras, Symphony
- Orchids, Bamboo
- Orchids, Easter
- Ore-rākau a tū
- Organic farming
- Organic gardening
- Organisations, Pan-iwi
- Organisations, Tribal
- Organs, Reproductive
- Organs, Sexual
- Orion's Belt
- Oriori
- Oro puare
- Ōrokohanga o te ao
- Ororeo
- Ororuarangi
- Osteopathy
- Otaota
- Otaota (Kai)
- Otaota hāwere
- Otaota waimāori
- Oumu
- Outdoor recreation
- Outer space
- Outrigger canoes
- Ovens, Earth
- Owls
- Owls, Laughing
- Oystercatchers, Black
- Oystercatchers, Pied
- Oysters