| 6423 | Kibiri | ubi | | | Wurm (1973) | |
| 19774 | Kimaghima | cu | | | Voorhoeve (1975) | |
| 158526 | Kinalakna | naŋge | | | McElhanon and Voorhoeve (1970) | water |
| 237037 | Kire | mbɨ | | | Foley (2005) | |
| 213746 | Kirikiri | na | | | Clouse (1997) | |
| 213745 | Kirikiri (Faia Dialect) | iɾa | | | Clouse (1997) | |
| 77714 | Klon | araa | | | Baird (2008) | |
| 35118 | Klon (Halerman Dialect) | yar | | | Stokhof (1975) | |
| 34999 | Klon (Probur Dialect) | ar'α | | | Stokhof (1975) | |
| 143306 | Kobol | nomar | | | Z'graggen (1980) | (water) |
| 196305 | Kobon | nɨg | + | | Pawley (2013) | |
| 163781 | Kobon | ɲɩŋkʰ | | | Davies and Comrie (1985) | water |
| 22059 | Kokoda (Kasuweri Dialect) | taya | | | Voorhoeve (1975) | |
| 22019 | Kokoda (Tarof Dialect) | tai | | | Voorhoeve (1975) | |
| 229622 | Kol | qu̠nu | | | SIL (1962) | |
| 230611 | Kol | 'gonu | | | SIL (1981) | |
| 158535 | Komba | to | | | McElhanon and Voorhoeve (1970) | water |
| 91221 | Komba | to | water | | McElhanon (1967) | water |
| 148382 | Komba (Ândâ River Dialect) | too | | | Southwell (1976) | water |
| 148381 | Komba (Gwama River (North) Dialect) | too | | | Southwell (1976) | water |
| 148384 | Komba (Gwama River (South) Dialect) | too | | | Southwell (1976) | water |
| 148383 | Komba (Puleng River Dialect) | too | | | Southwell (1976) | water |
| 201629 | Kombai | ox | | | Voorhoeve (2000) | |
| 210816 | Komyandaret | ʔɑ | | | Hughes (2009) | |
| 16611 | Konai | hwẽi | | | Shaw (1986) | |
| 22259 | Konda | abia | | | Voorhoeve (1975) | |
| 21298 | Koneraw | mui | | | Voorhoeve (1975) | |
| 245367 | Kopar (Singarin Dialect) | 'ařum | | | SIL (1977) | |
| 235363 | Kopar | arɨm | | | Foley (2005) | |
| 236033 | Kopar | arɨm | | | Foley (2005) | |
| 158559 | Korafe | uƀu | | | McElhanon and Voorhoeve (1970) | water |
| 28268 | Korafe | uƀu | | | Wilson (1969) | |
| 55753 | Korafe (Mokorua Dialect) | 'uβu | water | | Smallhorn (2011) | |
| 55755 | Korafe (Rabade Dialect) | 'uβu | water | | Smallhorn (2011) | |
| 143292 | Korak | zu | | | Z'graggen (1980) | (water) |
| 19939 | Korapun-Sela | mak | | | Voorhoeve (1975) | |
| 210613 | Korowai | ʔæ:ʔ | | | Hughes (2009) | |
| 33844 | Kosare | biɛ | water, river | | Heeschen (1978) | |
| 158522 | Kovai | lap | | | McElhanon and Voorhoeve (1970) | water |
| 143301 | Kowaki | opot | | | Z'graggen (1980) | (water) |
| 25485 | Kowiai | walar | | | Voorhoeve (1975) | |
| 91227 | Kube | doku | water | | McElhanon (1967) | water |
| 158532 | Kube | doku | | | McElhanon and Voorhoeve (1970) | water |
| 159340 | Kubo | hũĩ | | | McElhanon and Voorhoeve (1970) | water |
| 5706 | Kubo | hwi̧ | | | Shaw (1973) | |
| 158467 | Kubo | hũi | | | McElhanon and Voorhoeve (1970) | water |
| 7178 | Kubo | hwī | | | Shaw (1986) | |
| 36186 | Kui | ɛr | | | Stokhof (1975) | |
| 37708 | Kui (Kiramang Dialect) | ɛy | | | Stokhof (1975) | |
| 260683 | Kula | 'idža | | | Stokhof (1975) | |
