| 123884 | Murupi | baᵬɛ | | | Z'graggen (1980) | mountain |
| 192878 | Musak | wʌrɛ | | | Z'graggen (1980) | mountain |
| 142914 | Musar | hambin | | | Z'graggen (1980) | mountain |
| 91313 | Nabak | kaləŋ | mountain | | McElhanon (1967) | mountain |
| 197796 | Nagatiman | ᵽatiniʔ | | | Conrad and Dye (1975) | |
| 214060 | Nakai | ˈʕɑɽim | | | Hughes (2009) | |
| 199105 | Nakame (Dzenzen Dialect) | tuɑ | | | Retsema et al. (2009) | |
| 199735 | Nakame (Gufin Dialect) | tuwɑ | | | Retsema et al. (2009) | |
| 199625 | Nakame (Munguleng Dialect) | boboje | | | Retsema et al. (2009) | |
| 199624 | Nakame (Munguleng Dialect) | toɑ | | | Retsema et al. (2009) | |
| 199232 | Nakame (Popof Dialect) | tuɑ | | | Retsema et al. (2009) | |
| 198747 | Nakame (Sikalan Dialect) | saŋan | | | Retsema et al. (2009) | |
| 198868 | Nakame (Sokan Dialect) | hɑŋgi | | | Retsema et al. (2009) | |
| 198986 | Nakame (Wasin Dialect) | duaq | | | Retsema et al. (2009) | |
| 123886 | Nake | fahɛ | | | Z'graggen (1980) | mountain |
| 38784 | Nedebang | m'ugα | | | Stokhof (1975) | |
| 200201 | Nek (Goambot Dialect) | dzɑŋgɑn | | | Retsema et al. (2009) | |
| 192876 | Nend | aparmʌ | | | Z'graggen (1980) | mountain |
| 198232 | Nimo | you | | | Conrad and Dye (1975) | |
| 123902 | Nobonob | yɛr̃ɛr̃ | | | Z'graggen (1980) | mountain |
| 123900 | Nobonob | bay | | | Z'graggen (1980) | mountain |
| 123901 | Nobonob | bibr̃u | | | Z'graggen (1980) | mountain |
| 123903 | Nobonob | bigab | | | Z'graggen (1980) | mountain |
| 17265 | Northeast Kiwai (Arigibi Dialect) | 'noʔoa | | | Wurm (1973) | |
| 31453 | Northeast Kiwai (Gibaio Dialect) | no'ʔo:a | | | Wurm (1973) | |
| 2960 | Northeast Kiwai (Gope Dialect) | noʔoa | | | Wurm (1973) | |
| 976 | Northeast Kiwai (Urama Dialect) | noʔoa | | | Wurm (1973) | |
| 199824 | Nuk (Tamben Dialect) | tɨmɛn | | | Retsema et al. (2009) | |
| 199934 | Nuk (Tunam Dialect) | tɨmɛnɨ | | | Retsema et al. (2009) | |
| 200114 | Numanggang (Kawalang Dialect) | qeboboi | | | Retsema et al. (2009) | |
| 200036 | Numanggang (Tumung Dialect) | boboje | | | Retsema et al. (2009) | |
| 215516 | Obokuitai | isɛig̚ | | | Clouse (1997) | |
| 197435 | Odiai | abǫ | | | Conrad and Dye (1975) | |
| 16315 | Odoodee (Hesif Dialect) | mubi | | | Shaw (1986) | |
| 16215 | Odoodee (Kalamo Dialect) | isiyã | | | Shaw (1986) | |
| 179937 | Ogea | muǰu | | | Z'graggen (1980) | mountain |
| 3685 | Omati | kama | | | Franklin (1973) | |
| 16115 | Onabasulu | gali | | | Shaw (1986) | |
| 6010 | Onabasulu | gali | | | Shaw (1973) | |
| 91300 | Ono | bonaga | mountain | | McElhanon (1967) | mountain |
| 4578 | Opao | raepa | | | Brown (1973) | |
| 52257 | Orokaiva (Dobuduru Dialect) | tiri | hill | | Smallhorn (2011) | |
| 52258 | Orokaiva (Jegasa-Sarau Dialect) | tiri | mountain | | Smallhorn (2011) | |
| 52259 | Orokaiva (Sose Dialect) | [ino] diri[ko] | spur | | Smallhorn (2011) | |
| 52285 | Orokaiva (Sose Dialect) | heti | hill | | Smallhorn (2011) | |
| 3998 | Orokolo (Kaipi Dialect) | raepa | | | Brown (1973) | |
| 4682 | Orokolo | kela | | | Brown (1973) | |
| 215522 | Orya | kwatap | | | Clouse (1997) | |
| 233057 | Owiniga | tema | | | SIL (1972) | |
| 198522 | Owiniga | tema | | | Conrad and Dye (1975) | |
