- Mob-law
- Mobilize
- Mobster
- Mocker
- Mocking
- Mod
- Modeling
- Models
- Moderatrix
- Modern era
- Modern languages
- Modernism
- Modish
- Monogamist
- Modulate
- Moggie
- Mohur
- Molasses
- Molecular biology
- Molest
- Mollient
- Mollusc
- Mollycoddle
- Moralitically
- Molten
- Momentous
- Monarchist
- Monarchy
- Monazite
- Monday
- Money-box
- Money-market
- Mongrel
- Moniker
- Moniliform
- Monkey tamer
- Monkey up
- Monkish
- Mono-act farce
- Monoatomic
- Monobrow
- Monocarp
- Monocephalous
- Monocracy
- Monodrama
- Monomania
- Mononymous
- Monopolist
- Monopsychotic twins
- Monosyllabically
- Monotheism
- Monotonic
- Monotonous
- Monotype
- Monstruous
- Montage
- Month
- Month of chithra
- Monument
- Monumentally
- Moo
- Moocher
- Moodiness
- Moon light flitting
- Moon shiner
- Moon-calf
- Moon-god
- Moondrop
- Moonstone
- Moonstruck
- Moor
- Mooring
- Moot point
- Mophead
- Moral
- Moral science
- Moralize
- Morals
- Moratory
- Morbid protruberance of liver
- Morbidly
- More in it than meets the eyes
- More than anything else
- More than once
- Morganatic
- Morganatically
- Morgue
- Moringa tree
- Morly
- Mormonism
- Morning prayer
- Morning room
- Morocco
- Morphia
- Morphologist
- Morphology
- Morsin
- Mortgage deed
- Mortuary house
- Mos