Synonyms for effectual

Similarity of adj effectual

2 senses of effectual

Sense 1:

effective (vs. ineffective), effectual, efficacious
hard-hitting, trenchantimpellingimpressive, tellingrough-and-ready

Also See: efficacious#1; efficient#1; potent#3, strong#4, stiff#4; powerful#1; useful#1, utile#1

Sense 2:

legal, sound, effectual
valid (vs. invalid)