- master race
- master-at-arms
- masterbrand
- masterful
- masterfully
- masterly
- mastermind
- masterpiece
- masterstroke
- masterwork
- mastery
- masthead
- mastic
- masticate
- mastication
- masticatory
- mastiff
- mastitis
- mastodon
- mastoid
- mastoiditis
- masturbate
- masturbation
- masturbatory
- mat
- matador
- match
- match fitness
- match play
- match point
- matchboard
- matchbook
- matchbox
- match-fit
- match-fixing
- matching
- matchless
- matchlock
- matchmaker
- matchmaking
- matchstick
- match-winner
- matchwood
- mate
- mate
- mater
- material
- materialism
- materialist
- materialistic
- materialization
- materialize
- materially
- maternal
- maternity
- maternity allowance
- maternity benefit
- maternity leave
- maternity pay
- matey
- math
- mathematical
- mathematically
- mathematician
- mathematics
- mathlete
- maths
- maths coprocessor
- matinee
- matinee coat
- matinee idol
- matinee jacket
- matiness
- mating
- matins
- matriarch
- matriarchal
- matriarchy
- matricide
- matriculate
- matriculation
- matrilineal
- matrimonial
- matrimony
- matrix
- matrix management
- matron
- matron of honour
- matronly
- matt
- matte
- matted
- matter
- Matterhorn
- matter-of-fact
- matter-of-factly
- Matthew
- matting
- mattins
- mattock
- mattress
- maturation
- mature
- mature economy
- mature student
- maturity
- matzo
- maudlin
- maul
- maulers
- maunder
- Maundy money
- Maundy Thursday
- Mauritania
- Mauritanian
- Mauritian
- Mauritius
- mausoleum
- mauve
- maven
- maverick
- maw
- mawkish
- mawkishness
- max.
- max
- maxi
- maxilla
- maxim
- maximal
- maximalist
- maximize
- maximum
- maxwell
- may
- may
- May
- May ball
- may blossom
- May bug
- May Day
- May queen
- May week
- Maya
- Mayan
- maybe
- Mayday
- mayflower
- mayfly
- mayhem
- mayn't
- mayo
- mayonnaise
- mayor
- mayoralty
- mayoress
- maypole
- may've
- mayweed
- maze
- mazuma
- mazurka
- MB
- MBA
- MBBS
- MBE
- MBO
- MC
- MCAT
- MCC
- McCarthyism
- McCoy
- MCP
- MD
- MDT
- ME
- me
- me
- mead
- meadow
- meadow grass
- meadow pipit
- meadow saffron
- meadowland
- meadowsweet
- meagre
- meagrely
- meagreness
- meal
- meal ticket
- mealie meal
- meals on wheels
- mealtime
- mealworm
- mealy
- mealy bug
- mealy-mouthed
- mean
- meander
- meanie