adjective has 2 distinct synonyms spread across 2 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. Its one recorded opposite is substantive.
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 word that expresses an attribute of something
the word class that qualifies nouns
relating to court practice and procedure as opposed to the principles of law
“adjective law”
Synonyms, antonyms and the broader and narrower relations for adjective come from Princeton University’s WordNet. Full sources and licences.