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. Don Sodora:

   It's still being tested, merck is still trying to figure out how efficacious it is, but it can really provide an opportunity where you can start protecting people.

2. Gregory Poland:

   This is important, but it has to be done in a way that reassures scientists and the public that these (vaccines) are not only efficacious, but safe.

3. 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.

4. Clarence Thomas:

   There's been some talk... that the vaccinations are efficacious in preventing some degree of infection to others.

5. 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.