- mickey
- mickle
- micr
- microbe
- microcephal
- microcephalous
- microcosm
- microfiche
- mid-position
- midday
- middle
- migrant labourers
- military array
- military base
- mill
- mind over matter
- minstrel
- minted coin
- minus symbol
- minute-book
- minuteness
- mips
- mirage
- miry
- misappropriating
- miscalculate
- miscalculation
- mischief
- misconceive
- miserly
- misfire
- misguided
- mismatch
- misomaniac
- misplace
- misrepresent
- missal
- misshapen
- missionary
- mister
- misunderstand
- misuse
- miter
- mitigating
- mitigation
- mix-up
- mixer
- modesty
- modish
- mogul
- mogul emperor
- moisture
- molecular
- mollycoddle
- monarchy
- mongrel
- monkey about, monkey around
- monkey business
- monographic
- monolith
- monologue
- monosodium glutomate
- monotonic
- monoxide
- monster
- monstrous
- montane
- moon-faced
- moonlight
- moony
- moor fowl
- mops and mows
- moratory
- mordant
- motto
- moribund
- morsel
- mortal
- mostly
- mother-to-be
- motif
- motivate
- motivation
- mount the throne
- mouth organ
- movables
- movement
- mr.x
- mud
- mud turtle
- mud-slinger
- muggy
- multiangular
- multicuisine
- multiply
- mummification
- mumps
- municipal
- munificent person
- murky