Synonyms & related words for efficacy

Find synonyms, related words, and the definition of efficacy. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to efficacy

Explore words related to efficacy — words associated with it, words that go with it, and its nearest matches in meaning. Related words include efficaciousness, effectiveness, effectualness, effectuality, effectivity, efficacious, efficiency, potency. Click any word to make it the center of the map and keep exploring the web of connections.

Where does efficacy come from?

The word efficacy breaks down into one root of Latin origin: the root fic-, from Latin facio (“make, do”). Explore each root to see other English words built from the same source.