View definitions for efficaciousness


noun as in effect

Discover More

Example Sentences

Much has been made of the Pfizer and Moderna vaccines being 95 percent efficacious in preventing symptomatic illness.

However, these narratives of hatred recur precisely because they are efficacious at seducing and enthralling masses who driven by the promise of uncovering their own secret histories.

From Time

While all mutations are normal and most are relatively harmless, some shifts can change the structure and function of the virus in ways that will make the vaccines we currently have available less efficacious.

As a former biotech reporter, I know that drug development is a slog, so the fact that we have two very efficacious vaccines that made it to market in under a year is truly amazing.

It’s 94 percent to 95 percent efficacious in preventing you from getting clinically apparent disease, and almost 100 percent effective in preventing you from getting serious disease.

From Ozy

Learn then, that I am the inventor of the Vermifuge Balsam, whose sovereign efficaciousness is indisputable.

Yet it is evident that they could not have any physical efficaciousness.

Nothing that we learn could possibly suggest to us the idea of what an influence or efficaciousness is.

A friend of Homœopathy, not a physician, desired to test the efficaciousness of this plant.

A single one of its thrusts must equal and often surpass in efficaciousness the repeated wounds of the other.


On this page you'll find 23 synonyms, antonyms, and words related to efficaciousness, such as: capability, cogency, effectiveness, effectuality, effectualness, and efficacy.

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.