| Term | Definition |
| mercenary | altruistic, disinterested |
| moot | incontrovertible, indisputable, irrefutable |
| motley | monochrome, monochromatic; monolithic, homogeeous, uniform |
| mundane | celestial, heavenly, cosmic; unwordly, spiritual; metaphysical, transcendental; extraordinary, unique |
| myriad | finite, limited |
| narcissistic | self-deprecating, self-deprecatory, self-critical |
| nebulous | clear, distinct, well-defined, unambiguous |
| negligible | significant, considerable; telling, meaningful; critical, crucial, pivotal |
| nomadic | settled, fixed, staionary |
| nominal | real, actual; exorbitant, excessive |
| novice | expert, pro, veteran, old hand, past master, virtuoso |