- misogynist
- misquote
- miasmic, miasmal
- miasmatic
- moderation
- modernisation
- modernity
- modest
- modifier
- modulate
- modulus
- mofussil
- moist
- metathesis
- metastasize
- metallic
- metal pot
- monition
- metadata
- messy
- monument
- messily
- mooing of a cow
- mephitis
- moot
- mephitic
- mental acumen
- mensurable
- mendacious
- memorising
- memorised
- memorialise
- memorandum
- moulder
- mph
- memorable
- much of muchness
- muck something up
- memento
- muddle
- muddle along, muddle through
- meet
- meek
- medom
- meditative
- mouthful
- medicaid
- mediation
- meddlesome
- mechanistic
- mb
- mazily
- matzo
- mutant
- matter of record
- matter
- make amends
- matchmaker
- matching-gun
- mouldy
- most
- match-stick
- match up to
- martyr
- martin
- moschate
- marshal
- marsh
- marrow
- marr
- marquis
- marauding
- morphogenesis
- many-headed beast
- manufacturer
- mantle
- mantis
- manse
- manipulate
- manifest
- mangy
- manger
- mange
- manfully
- malediction
- malcontent
- morgue
- malarkey
- make ready
- majesty
- morganatically
- morello
- mainstream
- magisterial
- magenta
- madrid
- morbid
- madly
- made orderly
- macho