• Macrophobia - Fear of long waits
• Mageiricophobia - Fear of cooking
• Maieusiophobia - Fear of childbirth
• Malaxophobia - Fear of love play
• Maniaphobia - Fear of insanity
• Masklophobia - Fear of people in masks, costumes, and mascots
• Mastigophobia - Fear of punishment
• Mechanophobia - Fear of machines
• Megalophobia - Fear of large objects
• Melanophobia - Fear of the color black
• Melissophobia - Fear of bees
• Melophobia - Fear 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
• Microphobia - Fear of small things
• Misophobia - Fear of being contaminated with dirt or germs
• Mnemophobia - Fear of memories
• Molysmophobia - Fear of dirt or contamination
• Monopathophobia - Fear of definite disease
• Monophobia- Fear of solitude or being alone
• Motorphobia - Fear of automobiles
• Mottephobia - Fear of moths
• Musophobia - Fear of mice or rats
• Mycophobia - Fear of mushrooms
• Mycrophobia - Fear of small things
• Myctophobia - Fear of darkness
• Myrmecophobia - Fear of ants
• Mysophobia - Fear of germs, contamination, or dirt
• Mythophobia - Fear of myths or stories or false statements
• Myxophobia - Fear of slime