troll has 2 distinct synonyms spread across 2 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.
cause to move round and round
“The child trolled her hoop”
sing the parts of (a round) in succession
Synonyms, antonyms and the broader and narrower relations for troll come from Princeton University’s WordNet. Full sources and licences.
angle with a hook and line drawn through the water
praise or celebrate in song
“All tongues shall troll you”
speak or recite rapidly or in a rolling voice
(Scandanavian folklore) a supernatural creature (either a dwarf or a giant) that is supposed to live in caves or in the mountains
a fisherman's lure that is used in trolling
“he used a spinner as his troll”