Synonyms for efficacious
ˌɛf ɪˈkeɪ ʃəsef·fi·ca·cious

Princeton's WordNetRate these synonyms:0.0 / 0 votes

1. efficaciousadjective

   marked by qualities giving the power to produce an intended effect

   "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough"

   Synonyms:
   effectual, effective

   Antonyms:
   inefficacious

2. effective, effectual, efficaciousadjective

   producing or capable of producing an intended result or having a striking effect

   "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law"

   Synonyms:
   sound, effective, in effect(p), efficient, effectual, legal, in force(p), good

   Antonyms:
   inefficacious

Dictionary of English SynonymesRate these synonyms:0.0 / 0 votes

1. efficaciousadjective

   Synonyms:
   effectual, effective, powerful, active, operative, efficient, energetic, of adequate power

Synonyms, Antonyms & Associated WordsRate these synonyms:0.0 / 0 votes

1. efficaciousadjective

   Synonyms:
   potent, effectual, effective, productive

   Antonyms:
   inefficacious

PPDB, the paraphrase databaseRate these paraphrases:0.0 / 0 votes

1. List of paraphrases for "efficacious":

   effective, efficient

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How to use efficacious in a sentence?

1. Anthony Fauci:

   As we've said many times, and happy to reiterated right now, we have three highly efficacious vaccines with a very good safety profile, each preventing hospitalizations and deaths. That's point number one.

2. Julie Strickland:

   The more we can get out there to show that it’s safe and efficacious and really well tolerated and well liked among young adults, the better.

3. Nora Volkow:

   One of the things is, we don't have any evidence-based medication that has proven to be efficacious for the treatment of cocaine addiction, so we currently have no medicine to intervene, and it can be a very severe addiction and actually quite dangerous.

4. Maria Montessori:

   If an educational act is to be efficacious, it will be only that one which tends to help toward the complete unfolding of life. To be thus helpful it is necessary rigorously to avoid the arrest of spontaneous movements and the imposition of arbitrary tasks.

5. Salim Abdool Karim:

   We would start by vaccinating about 100,000 individuals in the first step. We would look at the hospitalization rates once we've done those vaccinations. And if we find that the hospitalization rates are below the threshold -- that we are looking at -- then we can be confident that the vaccine is efficacious... and if so, we can then proceed to continuing the rollout, if we find that the hospitalizations are substantial -- more than we anticipated -- then we would have to stop, take stock of where we are and perhaps switch to other vaccines.