Synonyms of effectual in English:

effectual


See US English definition of effectual

See UK English definition of effectual

See Spanish definition of eficaz

adjective

1‘effectual political action’

SYNONYMS
effective, successful, efficacious, productive, constructive, fruitful, potent, powerful
worthwhile, helpful, of help, of assistance, beneficial, advantageous, valuable, useful, of use
ANTONYMS

ineffectual

2‘an effectual document’

SYNONYMS
valid, authentic, legally acceptable, proper, bona fide, genuine, official, signed and sealed
lawful, legal, licit, legitimate, binding, legally binding, contractual
in force, in effect, effective