- moral principle
- misgovern
- Muntiacus
- Megaderma
- Microtus
- Mandrillus
- mammal Semnopithecus
- Marmota
- Meles
- Moschus
- Melursus
- Myrmecophaga
- Myopus
- Microdipodops
- Mesocricetus
- Mazama
- Muscardinus
- Mustela
- Martes
- Megatherium
- Myocastor
- Mammut
- Meriones
- Megaptera
- Monodon
- Mellivora
- Manis
- Myrmecobius
- Melogale
- Mammuthus
- Mus
- Mirounga
- Micromyx
- Myotis
- Mephitis
- mountain goat
- mammalian
- modest
- mocker
- mother_naked
- meadow saffron
- middle name
- metronymic
- matronymic
- mitford
- microcephalic
- microcephalous
- microcephalus
- microcephaly
- midget