• Samhainophobia - Fear of Halloween
• Sarmassophobia - Fear of love play
• Satanophobia - Fear of Satan
• Scabiophobia - Fear of scabies
• Scatophobia - Fear of fecal matter
• Scelerophibia - Fear of burglars
• Sciophobia - Fear of shadows
• Scoleciphobia - Fear of worms
• Scolionophobia - Fear of school
• Scopophobia - Fear of being seen
• Scoptophobia- Fear of being stared at
• Scotomaphobia - Fear of blindness in the visual field
• Scotophobia - Fear of darkness
• Scriptophobia - Fear of writing in public
• Selachophobia - Fear of sharks
• Selaphobia - Fear of light flashes
• Selenophobia - Fear of the moon
• Seplophobia - Fear of decaying matter
• Sesquipedalophobia - Fear of long words
• Sexophobia - Fear of the opposite sex
• Siderodromophobia - Fear of trains or railroads
• Siderophobia - Fear of stars
• Sinistrophobia - Fear of things to the left or left-handed
• Sinophobia - Fear of Chinese, Chinese culture
• Sitiophobia - Fear of food
• Sitophobia - Fear of eating
• Snakephobia - Fear of snakes
• Soceraphobia - Fear of parents-in-law
• Social Phobia - Fear of being evaluated negatively in social situations
• Sociophobia - Fear of society or people in general
• Somniphobia - Fear of sleep
• Sophophobia - Fear of learning
• Soteriophobia - Fear of dependence on others
• Spacephobia - Fear of outer space
• Spectrophobia - Fear of specters or ghosts
• Spermatophobia - Fear of germs
• Spheksophobia - Fear of wasps
• Stasiphobia - Fear of standing or walking
• Staurophobia - Fear of crosses or the crucifix
• Stenophobia - Fear of narrow things or places
• Stygiophobia - Fear of hell
• Submechanophobia - Fear of partially or fully submerged man-made objects
• Suriphobia - Fear of mice
• Symbolophobia - Fear of symbolism
• Symmetrophobia - Fear of symmetry
• Syngenesophobia - Fear of relatives
• Syphilophobia - Fear of syphilis