algarroba has 12 distinct synonyms spread across 4 of its 4 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.
long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute
evergreen Mediterranean tree with edible pods; the biblical carob
mesquite of Gulf Coast and Caribbean Islands from Mexico to Venezuela
Synonyms, antonyms and the broader and narrower relations for algarroba come from Princeton University’s WordNet. Full sources and licences.