Synonyms of compulsory in English:

compulsory


See US English definition of compulsory

See UK English definition of compulsory

See Spanish definition of obligatorio

adjective

1‘legislation which made the wearing of seat belts compulsory’

SYNONYMS
obligatory, mandatory, required, requisite, necessary, essential, statutory, prescribed
imperative, enforced, demanded, binding, forced, unavoidable, inescapable, incumbent, enforceable
contractual, stipulated, set
de rigueur
ANTONYMS

optional, voluntary