Macrophobia- Fear of long waits.
Mageirocophobia- Fear of cooking.
Maieusiophobia- Fear of childbirth.
Malaxophobia- Fear of love play. (Sarmassophobia)
Maniaphobia- Fear of insanity.
Mastigophobia- Fear of punishment.
Mechanophobia- Fear of machines.
Medomalacuphobia- Fear of losing an erection.
Medorthophobia- Fear of an erect penis.
Megalophobia- Fear of large things.
Melissophobia- Fear of bees.
Melanophobia- Fear of the color black.
Melophobia- Fear or hatred of music.
Meningitophobia- Fear of brain disease.
Menophobia- Fear of menstruation.
Merinthophobia- Fear of being bound or tied up.
Metallophobia- Fear of metal.
Metathesiophobia- Fear of changes.
Meteorophobia- Fear of meteors.
Methyphobia- Fear of alcohol.
Metrophobia- Fear or hatred of poetry.
Microbiophobia- Fear of microbes. (Bacillophobia)
Microphobia- Fear of small things.
Misophobia or Mysophobia- Fear of being contaminated with dirt or germs.
Mnemophobia- Fear of memories.
Molysmophobia or Molysomophobia- Fear of dirt or contamination.
Monophobia- Fear of solitude or being alone.
Monopathophobia- Fear of definite disease.
Motorphobia- Fear of automobiles.
Mottephobia- Fear of moths.
Musophobia or Muriphobia- Fear of mice.
Mycophobia- Fear or aversion to mushrooms.
Mycrophobia- Fear of small things.
Myctophobia- Fear of darkness.
Myrmecophobia- Fear of ants.
Mythophobia- Fear of myths or stories or false statements.
Myxophobia- Fear of slime. (Blennophobia)
