noun

the quality of being hot; high temperature.

the fierce heat of the sun

hotness,warmth,warmness,high temperature,fever,feverishness,calefaction

verb

make or become hot or warm.

the room faces north and is difficult to heat

warm,warm up,heat up,make hot,make warm,raise something’s temperature,take the chill off,reheat,cook,boil,bake,roast,toast,stew,fry,grill,hot,hot up,become hot,become warm,grow hot,grow warm,become hotter,become warmer,get hotter,get warmer,increase in temperature,rise in temperature