Sigmaphobia Fear of S . (branch of Grammaphobia / Panophobia)
Simaphobia Fear of signs.
Simphobia Fear of the Sims . (branch of Ludectrophobia / Ludophobia)
Simpsonphobia Fear of the Simpsons . (branch of Kyrofelonoshophobia)
Singultophobia Fear of hiccups.
Sinistrophobia Fear of things to the left or left-handed.
Sinophobia Fear of Chinese, Chinese culture.
Siropiphobia Fear of syrup . (branch of Cibophobia)
Sitiophobia Fear of food or eating.
Sitophobia Fear of food or eating.
Sixflagsphobia Fear of Six Flags.
Siyuephobia Fear of April.
Skataphobia Fear of the word 's'.
Skateboardphobia Fear of skateboards.
Skelephobia Fear of skeletons.
Skittlephobia Fear of skittles . (branch of Cibophobia)
Skoupaphobia Fear of brooms.
Sleighphobia Fear of sleighs . (branch of Ochophobia)
Slendermanphobia Fear of Slenderman . (branch of Kyrofelonoshophobia)
Smeourophobia Fear of raspberries . (branch of Cibophobia)
Smokeyphobia Fear of Smokey the Bear . (branch of Kyrofelonoshophobia)
Snakephobia Fear of snakes.
Snapophobia Fear of finger snapping.
Snerolakophobia Fear of ponds.
Snowmobilephobia Fear of snowmobiles . (branch of Ochophobia)
Soccerphobia Fear of soccer.
Soceraphobia Fear of parents-in-law.
Social Phobia Fear of being evaluated negatively in social situations.
Sociaphobia Fear of being judged in public.
Sociophobia Fear of society or people in general.
Soloiphobia Fear of watches (branch of Vestiphobia)
Somniphobia Fear of sleep.
Sonicphobia Fear of Sonic the Hedgehog . (branch of Kyrofelonoshophobia)
Sonyphobia Fear of Sony.
Sophophobia Fear of learning.
Sororophobia Fear of your sister.
Sostophobia Fear of correctness.
Soteriophobia Fear of dependence on others.
Soupaphobia Fear of soup . (branch of Cibophobia)
Southcarolinaphobia Fear of South Carolina.