| 143075 | Musar | hetaim | | | Z'graggen (1980) | cloud |
| 192968 | Musak | urnomor | | | Z'graggen (1980) | cloud |
| 124070 | Murupi | -- tugatamɛ | | | Z'graggen (1980) | cloud |
| 124071 | Murupi | saba balu | | | Z'graggen (1980) | cloud |
| 240665 | Murik (Wagamut Dialect) | ˈbʊn | | | Abbott (1985) | |
| 240561 | Murik (Karau Dialect) | ˈpʰasakʰ | | | Abbott (1985) | |
| 124054 | Munit | min | | | Z'graggen (1980) | cloud |
| 198637 | Mungkip | mof | | | Retsema et al. (2009) | |
| 192958 | Mum | igumbusa | | | Z'graggen (1980) | cloud |
| 258055 | Mulaha | dagadaga | | | Dutton (1970) | cloud |
| 27438 | Mubami | alɛta | | | Reesink (1976) | |
| 27437 | Mubami | ofutɔ | | | Reesink (1976) | |
| 3371 | Mubami | diadia′lai | | | Franklin (1973) | |
| 258054 | Motu | ori | | | Dutton (1970) | cloud |
| 124075 | Mosimo | sabe | | | Z'graggen (1980) | cloud |
| 124076 | Mosimo | -- amu | | | Z'graggen (1980) | cloud |
| 3473 | Morigi | tuboro | | | Wurm (1973) | |
| 192963 | Moresada | iŋguŋomp | | | Z'graggen (1980) | cloud |
| 32350 | Morawa | ori | | | SIL (1973) | |
| 7319 | Moni (Kemandoga Dialect) | kunu | | | Larson & Larson (1972) | |
| 29558 | Molof | maijar- wakawc | | | Voorhoeve (1971) | |
| 143071 | Moere | keperem | | | Z'graggen (1980) | cloud |
| 3054 | Minanibai | bubu | | | Franklin (1973) | |
| 180090 | Migum | tim tain | | | Z'graggen (1980) | cloud |
| 218252 | Migabac | keŋʒoŋ | keŋdoŋ | | SIL (1975) | |
| 143068 | Miani | urum | | | Z'graggen (1980) | cloud |
| 90840 | Mesem | kumbu | cloud | | McElhanon (1967) | cloud |
| 4785 | Menya | qakwa | | | Lloyd (1973) | |
| 257 | Mena | noramo | | | Franklin (1973) | |
| 76263 | Mbilua (Ndovele Dialect) | kutukutu | cloud | | Tryon & Hackman (1983) | |
| 76591 | Mbilua | lei | cloud | | Tryon & Hackman (1983) | |
| 76846 | Mbaniata (Lokuru Dialect) | hōhora | cloud | | Tryon & Hackman (1983) | |
| 76915 | Mbaniata | hōrō | cloud | | Tryon & Hackman (1983) | |
| 124087 | Mawan | romumu | | | Z'graggen (1980) | cloud |
| 124086 | Mawan | rom | | | Z'graggen (1980) | cloud |
| 143073 | Mawak | atoporak | | | Z'graggen (1980) | cloud |
| 143069 | Mauwake | aperka | | | Z'graggen (1980) | cloud |
| 124089 | Matepi | fur | | | Z'graggen (1980) | cloud |
| 258052 | Maria | ˈhoya | | | Dutton (1970) | cloud |
| 258050 | Maria (Uderi Dialect) | aˈgubi | | | Dutton (1970) | cloud |
| 258048 | Maria (Maranomu Dialect) | ˈhouya | | | Dutton (1970) | cloud |
| 258046 | Maria (Maiagolo Dialect) | ˈhoya | | | Dutton (1970) | cloud |
| 90846 | Mape | gâweŋ | cloud | | McElhanon (1967) | cloud |
| 29469 | Manem | tik | | | Voorhoeve (1971) | |
| 201418 | Mandobo Atas (Yonggom Dialect) | kumut | | | Voorhoeve (2000) | |
| 201330 | Mandobo Atas | kut | | | Voorhoeve (2000) | |
| 233230 | Mali (Makunga Dialect) | aǥalun | | | SIL (1985) | |
| 180110 | Male | laŋ | | | Z'graggen (1980) | cloud |
| 143061 | Malas | geit | | | Z'graggen (1980) | sky, cloud |
| 36350 | Makasae | nunu'dɛu | | | Stokhof (1975) | |
