lucifer has 11 distinct synonyms spread across 3 of its 3 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.
(Judeo-Christian and Islamic religions) chief spirit of evil and adversary of God; tempter of mankind; master of Hell
a planet (usually Venus) seen just before sunrise in the eastern sky
lighter consisting of a thin piece of wood or cardboard tipped with combustible chemical; ignites with friction
“he always carries matches to light his pipe”
Synonyms, antonyms and the broader and narrower relations for lucifer come from Princeton University’s WordNet. Full sources and licences.