- Multicoloured
- Multiform
- Multilingual
- Multinational
- Multiplication
- Multitasking
- Mummy
- Mumps
- Mundane
- Mundanely
- Mundanity
- Municipal
- Munificently
- Muniments
- Munitions
- Mural
- Murderer
- Muscle power
- Muscular
- Muscular dystrophy
- Muscularity
- Mush
- Mushily
- Music-hall
- Musical box
- Musical sound
- Musicality
- Musing
- Musketeer
- Muslim prayer
- Muslim preceptor
- Muslims rosary
- Mustache
- Mutual
- Muster
- Mutably
- Mutate
- Mutatis
- Muted
- Mutilated
- Mutterer
- Mutton dressed as lamb
- Mutuality
- Mvs
- Mvt
- My lady
- Myalgia
- Mycology
- Mynah
- Myopic
- Myself
- Mysteriously
- Mysteriousness
- Mystic
- Mystically
- Mystifying
- Mythically
- Mythologically
- Mythologist
- Mythopoetic
- Myths
- Mixedly
- Mugful
- Mane
- Matins
- Moanful
- Monarchic
- Monophysitism
- Musicalness
- Metre
- Machiavellini
- Machine code
- Machine logic
- Machinery
- Machismo
- Machivellian policy
- Macrosomia
- Mad as a march hare
- Madcap
- Madden
- Maddened
- Maddening
- Maddeningly
- Made faulty
- Made-up
- Madhava panikkar
- Madonna-lily
- Madrepore
- Maggot
- Magi
- Magic lantern
- Magic power
- Magician
- Magisterial
- Magistrate
- Magma
- Magnacarta
- Magnanimous
- Magnate
- Maddar