| A | B |
| hypochondriac | a person unduly concerned with health and often suffering from delusions of physical disease |
| hypocrisy | pretending to be what one is not or to feel what one does not really feel |
| hypothermia | subnormal temperature of the body |
| hypothetical | #1. involving an assumption made for the sake of argument or for further study or investigation #2. imagined for purposes of example |
| thermal | #1. of, relating to, or caused by heat #2. designed to insulate in order to retain body heat |
| thermocline | the region in a body of water that divides the warmer, oxygen-rich surface layer from the colder, oxygen-poor deep water |
| thermocouple | a device for measure temperature that makes use of the way different metals respond to heat |
| thermonuclear | of or relating to the changes in the nucleus of atoms with low atomic weight, such as hydrogen, that requires a very high temperature to begin |