Synonyms of effectual

Adjective

1. effective (vs. ineffective), effectual, efficacious, hard-hitting, trenchant, impelling, impressive, telling, rough-and-ready, efficacious, efficient, potent#3, strong#4, stiff, powerful, useful#1, utile

usage: producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law"

2. legal, sound, effectual, valid (vs. invalid)

usage: having legal efficacy or force; "a sound title to the property"

Definition and meaning of effectual (Dictionary)