Eff.

Synonyms for "eff." (150 found)

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Closest matches (30)

efficacious actual competent impressive operational able acid active adequate armipotent authoritative banausic basic beneficial biting capable charismatic charming chief cogent

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compelling consequential considerable conspicuous convincing corrosive cutting direct dramatic

Adjective(1 words)

Strong matches (45)

driving dynamic effectual efficient eloquent enchanting energetic equal to essential estimable expedient expeditious feasible force forceful forcible fruitful functional functioning go

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going gutsy happy hard hitting helpful high powered high-potency high-powered high-pressure high-tension impelling imperative important imposing in effect in force in operation in power

Adjective(6 words)

effectual efficacious efficient good in effect in force

Adjective(1 words)

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.