Synonyms of voluntary in English:

voluntary


See definition of voluntary

adjective

1‘attendance at lectures is voluntary’

SYNONYMS

optional, discretionary, at one's discretion, elective, non-compulsory, non-mandatory, not required, open, open to choice, volitional, up to the individual

permissive

rare discretional

ANTONYMS

compulsory, obligatory

2‘she spent some time doing voluntary work’

SYNONYMS

unpaid, unsalaried, without pay, without payment, free of charge, without charge, for nothing, for free

honorary, volunteer, unrewarded

pro bono, pro bono publico

ANTONYMS

paid