dwarf has 5 distinct synonyms spread across 3 of its 5 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 person who is markedly small
a legendary creature resembling a tiny old man; lives in the depths of the earth and guards buried treasure
Synonyms, antonyms and the broader and narrower relations for dwarf come from Princeton University’s WordNet. Full sources and licences.
a plant or animal that is atypically small
make appear small by comparison
“This year's debt dwarfs that of last year”
check the growth of
“the lack of sunlight dwarfed these pines”