ice has 20 distinct synonyms spread across 8 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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 frozen dessert with fruit flavoring (especially one containing no milk)
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
a rink with a floor of ice for ice hockey or ice skating
“the crowd applauded when she skated out onto the ice”
cause to become ice or icy
“an iced summer drink”
Synonyms, antonyms and the broader and narrower relations for ice come from Princeton University’s WordNet. Full sources and licences.
put ice on or put on ice
“Ice your sprained limbs”