- Mica
- Mice
- Microbe
- Microbic
- Microbiology
- Middle
- Microlight
- Microlith
- Microorganism
- Microscopic
- Micturate
- Mid-portion
- Mid-position
- Midden
- Middle class
- Middle english
- Middle finger
- Middle portion
- Middle watch
- Middle-manship
- Middling
- Midpoint
- Midriff
- Midst
- Midwinter
- Mightiest
- Mightily
- Migration
- Mil
- Milching
- Mildews
- Mile
- Mileage
- Milestone
- 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
- M-commerce
- Macadamize
- Macaroni
- Macerator
- Machination
- Machine gun
- Mackerel-sky
- Mackintosh
- Macula
- Maculine
- Mad dog
- Mad king
- Mad woman
- Madam
- Madame
- Made
- Made for each other
- Made orderly
- Made to measure
- Madeira
- Madman
- Madness