unenforced has no recorded synonym. 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 enforced.
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.
not enforced; not compelled especially by legal or police action
“too many unenforced laws can breed contempt for law”
Synonyms, antonyms and the broader and narrower relations for unenforced come from Princeton University’s WordNet. Full sources and licences.