heat has 18 distinct synonyms spread across 9 of its 11 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is cool.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a form of energy that is transferred by a difference in temperature
the trait of being intensely emotional
applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
a preliminary race in which the winner advances to a more important race
Synonyms, antonyms and the broader and narrower relations for heat come from Princeton University’s WordNet. Full sources and licences.
provide with heat
“heat the house”