Synonym Chooser

How does the adjective efficient contrast with its synonyms?

Some common synonyms of efficient are effective, effectual, and efficacious. While all these words mean "producing or capable of producing a result," efficient suggests an acting or a potential for action or use in such a way as to avoid loss or waste of energy in effecting, producing, or functioning.

an efficient small car

In what contexts can effective take the place of efficient?

While in some cases nearly identical to efficient, effective stresses the actual production of or the power to produce an effect.

an effective rebuttal

When would effectual be a good substitute for efficient?

The words effectual and efficient are synonyms, but do differ in nuance. Specifically, effectual suggests the accomplishment of a desired result especially as viewed after the fact.

the measures to stop the pilfering proved effectual

Where would efficacious be a reasonable alternative to efficient?

The synonyms efficacious and efficient are sometimes interchangeable, but efficacious suggests possession of a special quality or virtue that gives effective power.

a detergent that is efficacious in removing grease

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of efficient Learning these important skills takes practice to feel comfortable at any age, but doing so will help turn intimidating medical appointments into more efficient and productive — and less stressful — visits. Dr. Jill Grimes, CNN Money, 8 Sep. 2025 The companies building them are laying the groundwork for a future that’s more efficient and more resilient — and, if developed thoughtfully, one that augments work without losing the critical role people play. Nick Lichtenberg, Fortune, 8 Sep. 2025 Such extensive reuse is a core part of SpaceX's vision to make spaceflight cheaper and more efficient. Mike Wall, Space.com, 28 Aug. 2025 Hydrogen and helium atoms are not efficient radiators below several thousand degrees, but molecular hydrogen, H₂, is great at cooling gas at low temperatures. ArsTechnica, 27 Aug. 2025 See All Example Sentences for efficient
Recent Examples of Synonyms for efficient
Adjective
  • How To Clean Linoleum Floors With Vinegar Vinegar is effective at cleaning floors and disinfecting them, but for more cleaning power, add a few squirts of dish soap to the mix, which works well at removing grease and grime from floors.
    Daley Quinn, Southern Living, 7 Sep. 2025
  • Alpine remains in a significant state of rebuild under Briatore, its effective boss.
    Madeline Coleman, New York Times, 6 Sep. 2025
Adjective
  • The Phillies have discovered a productive unit by cutting their most expensive outfielder’s playing time and rallying around three guys who are probably still platoon players but are making the most of every chance.
    Matt Gelb, New York Times, 11 Sep. 2025
  • As for jobs in programming, a field that’s already faced changes thanks to the new tech, Altman noted that AI tools have made coders far more productive, but the long-term impact is still unclear.
    Jessica Coacci, Fortune, 11 Sep. 2025
Adjective
  • Other than making sure police are contacted, workers are instructed to take safety precautions and make sure that families understand the risk involved with the highly potent illicit drug.
    Laura Bauer, Kansas City Star, 7 Sep. 2025
  • The most demanding users would probably like a more potent machine, like some of the larger options here, but the Blade 14 can largely serve as your mobile media-crunching PC when needed, and normal productivity tasks are mere snacks for it.
    Matthew Buzzi, PC Magazine, 7 Sep. 2025

Cite this Entry

“Efficient.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficient. Accessed 14 Sep. 2025.

More from Merriam-Webster on efficient

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