The word “efficaciousness” has 5 syllables: ef-fi-ca-cious-ness
It's pronounced as /ˌɛfɪˈkeɪʃəsnəs/
What is synonym and antonym for efficaciousness?
In the thesaurus, “efficaciousness” has 18 synonyms and 14 antonyms.
Here are synonyms and antonyms for efficaciousness along with examples of usage in sentences.
On this page you'll find 32 synonyms, antonyms, or another words to efficaciousness, such as: ability, capability, capacity, cogency, edge, effectiveness, effectuality.
Make sure to choose synonyms and antonyms that are appropriate for the context of the sentence.