osculate has 3 distinct synonyms spread across 1 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.
be intermediate between two taxonomic groups
“These species osculate”
have at least three points in common with
“one curve osculates the other”
touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.
Synonyms, antonyms and the broader and narrower relations for osculate come from Princeton University’s WordNet. Full sources and licences.
“The newly married couple kissed”