| A | B |
|---|
| hyperacidity | excessive acidity |
| hyperactive | excessively active |
| hypercritical | excessively fault-finding |
| hypersensitive | abnormally sensitive |
| hypertension | abnormally high blood pressure |
| hypodermic | small syringe with a hollow needle for making injections beneath the skin |
| hypoglycemic | afflicted with an abnormally low concentration of sugar in the blood |
| hyposensitize | make less sensitive |
| hypotension | abnormally low blood pressure |
| hypothermia | subnormal body temperature |
| subaqueous | underwater |
| subcutaneous | being, living, or introduced beneath the skin |
| sublethal | not quite death-causing |
| submarginal | below minimum standards |
| subservient | useful in an under, or subordinate, capacity |
| supererogatory | beyond the requirements of duty |
| superficial | over or on the surface only |
| supernatural | beyond what is natural or observable |
| supernumerary | exceeding the standard or prescribed number; extra |
| supersonic | having a speed beyond that of sound |
