- [ ] machinery
- [ ] maglev
- [ ] magma
- [ ] magnesium
- [x] magnet
- [x] magnetic
- [ ] magnificent
- [ ] magnify
- [ ] magnitude
- [x] maintain
- [ ] maintenance
- [x] major
- [ ] make a point
- [ ] make do with
- [ ] make ends meet
- [ ] make out
- [ ] make sense
- [ ] make sure
- [ ] make the most of
- [ ] make up
- [x] male
- [ ] mammal
- [ ] mammoth
- [x] manage
- [ ] maneuver
- [x] mania
- [ ] manifest
- [ ] manipulate
- [x] manner
- [ ] mansion
- [ ] mantle
- [x] manual
- [x] manufacture
- [ ] marble
- [ ] march
- [ ] margin
- [ ] marine
- [ ] maritime
- [x] marked
- [x] market
- [ ] marrow
- [ ] marsh
- [ ] marvel
- [x] mask
- [ ] mason
- [x] mass
- [ ] mast
- [ ] mat
- [x] match
- [x] mate
- [x] material
- [x] mathematics
- [x] mature
- [ ] maturity
- [x] maximum
- [ ] meager
- [ ] meantime
- [x] measure
- [ ] mechanic
- [x] mechanism
- [ ] mechanist
- [ ] mechanize
- [ ] medal
- [x] media
- [ ] mediate
- [ ] medieval
- [ ] medium
- [ ] melodic
- [ ] melodie
- [x] melody
- [x] melt
- [x] melting
- [ ] membrane
- [x] mental
- [x] mention
- [x] menu
- [ ] mercantile
- [ ] merchandise
- [ ] merchant
- [x] mercury
- [x] mercy
- [ ] mere
- [ ] merit
- [ ] metabolic
- [ ] metallic
- [x] meteor
- [ ] meteorite
- [ ] meteorology
- [ ] methane
- [x] method
- [ ] meticulous
- [ ] metric
- [ ] metropolis
- [ ] microbe
- [ ] microorganism
- [ ] microprocessor
- [x] microscope
- [x] microwave
- [ ] might as well
- [ ] mighty
- [ ] migrate
- [ ] mild
- [ ] military
- [ ] millennium
- [ ] mime
- [ ] mimic
- [x] mine
- [ ] mineral
- [x] minimal
- [x] minimize
- [x] minimum
- [x] minor
- [ ] minority
- [ ] mint
- [x] minute
- [x] miracle
- [x] miserable
- [x] mission
- [x] mobile
- [ ] mock
- [ ] mode
- [ ] modeling
- [ ] modem
- [ ] moderate
- [ ] modest
- [x] modify
- [ ] modulate
- [x] moist
- [x] moisture
- [ ] mold
- [ ] molecule
- [x] molten
- [ ] monarch
- [x] monitor
- [ ] monopolize
- [ ] monotonous
- [x] monster
- [ ] monumental
- [x] moral
- [ ] morale
- [ ] mosaic
- [ ] mosquito
- [ ] most of all
- [ ] moth
- [ ] motif
- [x] motion
- [ ] motivate
- [x] motive
- [x] motor
- [ ] mottled
- [ ] mount
- [ ] mountainous
- [x] multiple
- [x] multiply
- [x] multitude
- [ ] mundane
- [ ] municipal
- [ ] mural
- [x] muscle
- [x] mushroom
- [x] musical
- [x] musician
- [x] musicologist
- [ ] mutual
- [ ] myriad
- [x] myth
- [x] mythical
- [x] mythology