Noun

• S: (n) heat, heat energy (a form of energy that is transferred by a difference in temperature)
• S: (n) hotness, heat, high temperature (the presence of heat)
• S: (n) heat, warmth (the sensation caused by heat energy)
• S: (n) heat, warmth, passion (the trait of being intensely emotional)
• S: (n) estrus, oestrus, heat, rut (applies to nonhuman mammals: a state or period of heightened sexual arousal and activity)
• S: (n) heat (a preliminary race in which the winner advances to a more important race)
• S: (n) heating system, heating plant, heating, heat (utility to warm a building) "the heating system wasn't working"; "they have radiant heating"

Verb

• S: (v) heat, heat up (make hot or hotter) "the sun heats the oceans"; "heat the water on the stove"
• S: (v) heat (provide with heat) "heat the house"
• S: (v) inflame, stir up, wake, ignite, heat, fire up (arouse or excite feelings and passions) "The ostentatious way of living of the rich ignites the hatred of the poor"; "The refugees' fate stirred up compassion around the world"; "Wake old feelings of hatred"
• S: (v) heat, hot up, heat up (gain heat or get hot) "The room heated up quickly"