- modulus
- mofussil
- moist
- monochord
- monocle
- monolithic
- monorhyme
- monotype
- monovalent
- moral turpitude
- moralize
- morbid protruberance of liver
- morbific
- more or less
- moulder
- mph
- much of muchness
- muck something up
- muddle
- muddle along, muddle through
- muss
- muster in force
- mutilate
- mutual
- muzzle
- mycology
- mystery
- mentally
- mistrust
- make someone's hackles rise
- make someone' hair stand on end
- meditate
- macerate
- make
- make off with
- malevolence
- man
- manageable
- manic
- mankind
- man-made
- manufacture
- marginal
- maritime
- masterful
- mature
- mobilize
- mean
- mechanize
- medal
- mediocre
- medium
- mendicant
- menu
- merchant
- merely
- merry-go-round
- metropolis
- middleman
- midway
- mien
- mimic
- mortification
- minute
- misbegotten
- myriad
- miserliness
- missive
- mistake
- mitigate
- monetary
- monotony
- moral
- morality
- mountain
- muck about, muck around
- musician
- musing
- mythological
- make it snappy
- mine detector
- mountain slope
- make a splash
- mother-of-pearl
- make waves
- mazurka
- michalia champaka
- make merry over
- melanin
- mightiness
- morning sickness
- mustard oil
- musicianship
- moanful
- mutual consent
- meaningless word
- mystic power
- make oneself master of
- matronship
- malleability