| 157364 | Nimi | me | | | McElhanon and Voorhoeve (1970) | tooth |
| 157312 | Ninggerum | niŋi | | | McElhanon and Voorhoeve (1970) | tooth |
| 20861 | Ninggerum | niŋi ko: | | | Voorhoeve (1975) | |
| 243380 | Ningil | na: | | | Laycock (1968) | |
| 120493 | Nobonob | ai- | | | Z'graggen (1980) | tooth |
| 157374 | Nomu | ɛzɛt | | | McElhanon and Voorhoeve (1970) | tooth |
| 17240 | Northeast Kiwai (Arigibi Dialect) | 'gíli | | | Wurm (1973) | |
| 31428 | Northeast Kiwai (Gibaio Dialect) | 'íbo:˥˩nɛ: | | | Wurm (1973) | |
| 2935 | Northeast Kiwai (Gope Dialect) | giri | | | Wurm (1973) | |
| 951 | Northeast Kiwai (Urama Dialect) | giri | | | Wurm (1973) | |
| 157369 | Nuk | mɛ | | | McElhanon and Voorhoeve (1970) | tooth |
| 157341 | Nukna | mʌtap | | | McElhanon and Voorhoeve (1970) | tooth |
| 157366 | Numanggang | maŋ | | | McElhanon and Voorhoeve (1970) | tooth |
| 197465 | Odiai | wuti | | | Conrad and Dye (1975) | |
| 16290 | Odoodee (Hesif Dialect) | mei | | | Shaw (1986) | |
| 16190 | Odoodee (Kalamo Dialect) | mɛ̃ | | | Shaw (1986) | |
| 176817 | Ogea | ma- | | | Z'graggen (1980) | tooth |
| 176818 | Ogea | ŋɛdo- | | | Z'graggen (1980) | tooth |
| 75462 | Oirata | 'wain | | | Taber (1993) | |
| 243374 | Olo | nelpə | | | Laycock (1968) | |
| 3660 | Omati | kokame | | | Franklin (1973) | |
| 5985 | Onabasulu | pese | | | Shaw (1973) | |
| 16090 | Onabasulu | pese | | | Shaw (1986) | |
| 243371 | One, Inebu | nala | | | Laycock (1968) | |
| 91524 | Ono | ŋet- | (its) tooth | | McElhanon (1967) | (its) tooth |
| 157372 | Ono (Kip Dialect) | ŋɛt | | | McElhanon and Voorhoeve (1970) | tooth |
| 4553 | Opao | kao | | | Brown (1973) | |
| 24047 | Ormu | nuya | | | Voorhoeve (1975) | |
| 55240 | Orokaiva | ti | tooth | | Smallhorn (2011) | |
| 55236 | Orokaiva (Dobuduru Dialect) | ti | tooth | | Smallhorn (2011) | |
| 55235 | Orokaiva (Dobuduru Dialect) | di | tooth | | Smallhorn (2011) | |
| 157403 | Orokaiva (Dobuduru Dialect) | ti | | | McElhanon and Voorhoeve (1970) | tooth |
| 28141 | Orokaiva (Dobuduru Dialect) | ti | | | Wilson (1969) | |
| 157405 | Orokaiva (Jegarata-Kakendetta Dialect) | ti | | | McElhanon and Voorhoeve (1970) | tooth |
| 28189 | Orokaiva (Jegarata-Kakendetta Dialect) | ti | | | Wilson (1969) | |
| 55237 | Orokaiva (Jegarata-Kakendetta Dialect) | ti | tooth | | Smallhorn (2011) | |
| 55238 | Orokaiva (Jegasa-Sarau Dialect) | di | tooth | | Smallhorn (2011) | |
| 28224 | Orokaiva (Kendata Dialect) | ti | | | Wilson (1969) | |
| 55239 | Orokaiva (Kendata Dialect) | ti | tooth | | Smallhorn (2011) | |
| 157404 | Orokaiva (Kendata Dialect) | ti | | | McElhanon and Voorhoeve (1970) | tooth |
| 28364 | Orokaiva (Sairope Dialect) | ti | | | Wilson (1969) | |
| 157402 | Orokaiva (Sairope Dialect) | ti | | | McElhanon and Voorhoeve (1970) | tooth |
| 55244 | Orokaiva (Sairope Dialect) | ti | tooth | | Smallhorn (2011) | |
| 55242 | Orokaiva (Sose Dialect) | ti | tooth | | Smallhorn (2011) | |
| 3973 | Orokolo (Kaipi Dialect) | tao | | | Brown (1973) | |
| 4657 | Orokolo | kao | | | Brown (1973) | |
| 25805 | Orya | ek | | | Voorhoeve (1975) | |
| 198557 | Owiniga | imɛři | | | Conrad and Dye (1975) | |
| 232985 | Owiniga | imɛři | | | SIL (1972) | |
| 246265 | Owiniga | i'mʌli | | | SIL (1963) | |
