coil has 14 distinct synonyms spread across 5 of its 9 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 uncoil.
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 transformer that supplies high voltage to spark plugs in a gasoline engine
a contraceptive device placed inside a woman's womb
reactor consisting of a spiral of insulated wire that introduces inductance into a circuit
make without a potter's wheel
“This famous potter hand-builds all of her vessels”
Synonyms, antonyms and the broader and narrower relations for coil come from Princeton University’s WordNet. Full sources and licences.