- make up one's mind
- malleable
- mishap
- misgiving
- maltreat
- miscount
- mammoth
- man in the street
- man of good standing
- man of the house
- misconstrue
- manservant
- mansion
- manual training
- manure with leaves
- many
- many hundreds
- misconstruction
- misconduct
- marsilia quadrifolia
- marxian
- material medica
- maternity
- matriarchal
- meandering
- meaningless
- mechanical
- medium term
- medley
- move
- meme
- memoir
- memorandum of understanding
- memorial
- memorisation
- menacing
- minuend
- messenger of peace
- messmate
- metallic voice
- metamorphosis
- meteor
- meteoric
- microfilm
- microscopic
- microsoft
- mid-day nap
- mid-on
- midden
- mouthful
- minister
- miniature
- middle-east
- militate against
- milk food
- milk skin
- milky
- milky way
- milliard
- millibar
- mimosa pudica
- minatory
- mind one's own business
- minesweeper
- minutiae
- minx
- mirthful
- misadventure
- misanthrope
- misapply
- misapprehension
- miscarry
- miscellaneous
- miscellany
- misinformation
- mismatched
- misprint
- mitochondria
- mix something up
- mixed up in
- mixture
- mixy-maxy
- militarize
- mob
- mobile
- militant
- mont blanc
- montage
- moobs
- moody
- moon
- moon-calf
- moonlit
- moonlit dome
- moons disc
- mope
- mouldy
- motion
- motionless
- motive