ginger has 5 distinct synonyms spread across 4 of its 6 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.
perennial plants having thick branching aromatic rhizomes and leafy reedlike stems
Synonyms, antonyms and the broader and narrower relations for ginger come from Princeton University’s WordNet. Full sources and licences.
pungent rhizome of the common ginger plant; used fresh as a seasoning especially in Asian cookery
add ginger to in order to add flavor
“ginger the soup”
(used especially of hair or fur) having a bright orange-brown color
“a man with gingery hair and bright blue eyes”