- Maddar
- Malignly
- Malinger
- Mandrill
- Masculinely
- Messmate
- Metanarrative
- Metronome
- Moiety
- Murkiness
- 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
- Madrigal
- Maestro
- Magic eye
- Magic realism
- Magnanimity
- Magnanimously
- Magnetic card reader
- Magnetometer
- Magnificat
- Magnificence
- Magnificent
- Magnificently
- Magnify
- Magniloquent
- Mahabharatha
- Maiden name
- Maiden-like
- Mail-boat
- Mail-runner
- Mailed fist
- Maimness
- Main storage
- Main venue
- Mainland