alphabet

Efficacious

Pronunciation of Efficacious
/ˌɛfɪkˈe͡ɪʃəs/, /ˌɛfɪkˈe‍ɪʃəs/, /ˌɛ_f_ɪ_k_ˈeɪ_ʃ_ə_s/

Antonyms for efficacious:

unproductive, counterproductive, inefficacious, bootless, unsuccessful, vain, empty, inefficient.

Synonyms for efficacious:

Sense 1

active, predominant.

Sense 2

productive.

available

usable.

convincing

persuasive.

genuine

valid.

useful

helpful.

well-advised

judicious.

Other synonyms and related words:

usable, legal, efficient, operative, persuasive, useful, powerful, active, predominant, productive, sound, potent, judicious, fruitful, valid, effective, helpful.

effective (adjective)

powerful, productive.

efficient, productive (adjective)

effectual, active, potent, useful, operative, powerful, effective.

Sense 1 (noun)

helpful, useful.

Sense 2 (noun)

productive.

efficacious (noun)

hard-hitting, rough-and-ready, effective, impressive, impelling, trenchant, telling, effectual.

Usage examples for efficacious:

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