Scotomaphobia Fear of blindness in visual field. 
Snapophobia Fear of finger snapping. 
Surdocaecophobia Fear of deafblind people . 
Syphilophobia Fear of syphilis. 
Tetanophobia Fear of lockjaw, tetanus. 
Tourettephobia Fear of Tourette syndrome . 
Traumaphobia Fear of physical injury. 
Traumatophobia Fear of injury. 
Tremophobia Fear of trembling. 
Trichinophobia Fear of trichinosis. 
Tuberculophobia Fear of tuberculosis. 
Tussaphobia Fear of coughing. 
Virophobia Fear of viruses