- make scapegoat of
- make something out
- make up
- make up for
- make up one's mind
- malleable
- maltreat
- mammoth
- man in the street
- man of good standing
- man of the house
- manservant
- mansion
- manual training
- manure with leaves
- many
- many hundreds
- marsilia quadrifolia
- marxian
- material medica
- maternity
- matriarchal
- mechanical
- medium term
- medley
- meme
- memoir
- memorandum of understanding
- memorial
- memorisation
- menacing
- mercantile community
- mercifully
- merger
- merman
- mesh
- mesquite
- meteorology
- methodologist
- mew
- mewl
- microbial
- militate against
- milk food
- milk skin
- milky
- milky way
- milliard
- millibar
- mimosa pudica
- minatory
- mind one's own business
- minutiae
- minx
- mirthful
- misadventure
- misanthrope
- misapply
- misapprehension
- miscarry
- miscellaneous
- miscellany
- misinformation
- mismatched
- misprint
- mitochondria
- mix something up
- mixed up in
- mixture
- mixy-maxy
- mob
- mobile
- molecular biology
- moleskin
- molest
- mollusc
- molluscum contagiosum
- molotov cocktail
- moment
- monandry
- monocot
- monodrama
- monogamist
- monopolist
- monosyllable
- monotheistic
- monotone
- monotonous
- moral law
- morass
- more information
- more kicks than half penny
- motion
- motionless
- motive
- much awaited
- muddiness
- muddled
- muffled
- multi-storied