| Term | Definition |
| honorific for nouns | おー |
| delicious, tasty | おいしい |
| many | おおい |
| big | おおきい |
| big | おおきな |
| great number of people | おおぜい |
| mother | おかあさん |
| confections, sweets, candy | おかし |
| money | おかね |
| to get up, to rise | おきる |
| to put, to place | おく |
| wife | おくさん |
| alcohol, sake (rice wine) | おさけ |
| plate, dish | おさら |
| uncle, middle-aged man | おじさん |
| grandfather, male senior citizen | おじいさん |
| to teach, to inform, to instruct | おしえる |
| to push, to press, to stamp (ie. a passport) | おす |
| late, slow | おそい |
| tea (green) | おちゃ |
| toilet, restroom, lavatory, bathroom | おてあらい |
| father | おとうさん |
| younger brother | おとうと |
| man | おとこ |
| boy | おとこのこ |
| day before yesterday | おととい |
| year before last | おととし |
| adult | おとな |
| stomach | おなか |
| same, identical, similar | おなじ |
| older brother (respectful) | おにいさん |
| older sister (respectful) | おねえさん |
| aunt | おばさん |
| grandmother, female senior citizen | おばあさん |
| bath | おふる |
| boxed lunch | おべんとう |
| to remember, to memorize | おばえる |
| policeman (friendly term) | おはわりさん |
| heavy | おもい |
| serious | おもい |
| interesting, amusing | おもしろい |
| to swim | およぐ |
| to alight (eg from a bus), to get off | おりる |
| to finish, to close | おわる |
| music, musical movement | おんがく |
| woman, girl, daugher | おんな |
| girl | おんなのこ |
| counter for occurances | ーかい |
| counter for stories on a building | ーかい |
| foreign country | がいこく |