- Saber... to Salicylism...
- Salivary... to Saponification...
- Sapremia... to Scaglietti...
- Scald... to Schilder...
- Schilling... to Schneider...
- Schneiderian... to Sclera...
- Sclerectasia... to Scorbutus...
- Scotoma... to Seclusiveness...
- Secondary... to Sensibility...
- Sensitive... to Serum...
- Sesamoiditis... to Shifting...
- Shiga... to Sialaporia...
- Sialectasia... to Sighing...
- Sigmoid... to Sinusitis...
- Sipple... to Slate...
- Sleep... to Snapping...
- Sneddon... to Sotos...
- Sounds... to Spens...
- Sperm... to Spielmeyer...
- Spielmeyer... to Splenopneumonia...
- Splenoptosis... to Sporotrichum...
- Spots... to Standstill...
- Stannosis... to Steele...
- Stein... to Sticker...
- Stickler... to Stoma...
- Stomach... to Streptococcemia...
- Streptococcicosis... to Strongylus...
- Strophulus... to Subcostal...
- Subcutaneous... to Substernal...
- Substitution... to Sunburn...
- Sunken... to Suspected...
- Suspended... to Sylvest...
- Symblepharon... to Synodontia...
- Synorchidism... to System...