- mudder
- Monopoly
- mammoth
- mucopolysaccharidosis
- marble bones disease
- McArdle's disease
- mollification
- make_peace
- meno mosso
- middleman
- muffin man
- message pad
- messenger boy
- mohammed reza pahlavi
- mountain pine
- mohammed reza pahlevi
- metralgia
- mastalgia
- melagra
- meralgia
- miniaturist
- muralist
- mansion house
- micropaleontology
- misch metal
- mu
- mem
- mubarak
- methylphenidate
- moroccan dirham
- muscularity
- mechanical energy
- Ming dynasty
- Merovingian dynasty
- Ming
- Merovingian
- manchurian
- manchester terrier
- medical student
- mediety
- medical extern
- medical intern
- March 19
- multinomial
- mixed_blood
- manifold
- mucky
- mercenaria mercenaria
- making
- measure up