- miller
- mad
- macerate
- mother-in-law
- motley
- masterly
- mottled
- mould
- mouldy
- mouthful
- move
- mast
- monetary
- multicoloured
- mow someone down, mow something down
- much
- much to seek
- mucky
- muddy
- mason bee
- martinet
- mundane
- municipal corporation
- marry
- musk-deer
- marriage guidance
- mutable
- mutant
- mutiny
- muzzy
- mythology
- mythomania
- marlin
- market-value
- marital
- marine
- marijuana
- march
- mannerism
- mannequin
- manipulator
- manifestation
- mania
- manhandle
- mandatory
- man-sized
- man to man
- man of words
- man of moods
- man of means
- maltreatment
- malpractice
- malformed
- male-spirited
- malapropism
- maladroit
- maker
- monotony
- make-believe
- moral
- morality
- memorize
- medium
- muster in force
- mediocre
- medal
- mechanize
- muss
- mean
- mobilize
- mature
- masterful
- masculine
- maritime
- marginal
- marauder
- manufacture
- man-made
- mankind
- manic
- manageable
- man
- mountain
- malinger
- malevolence
- malaise
- make off with
- make
- maidenly
- meditate
- mountebank
- make someone' hair stand on end
- make someone's hackles rise
- make the grade
- mistrust
- mentally
- mendicant
- muck about, muck around
- mumble
- murder