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01 Word definition

efficacy

8 letters · 3 vowels · 5 consonants

Is EFFICACY a word?

Yes. EFFICACY is a 8-letter noun. capacity or power to produce a desired effect Check the official dictionary for your particular word game before playing it.

Correct spelling

How do you spell EFFICACY?

E-F-F-I-C-A-C-Y

EFFICACY contains 8 letters, begins with E, and ends with Y.

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Meaning and definition

1noun

  1. capacity or power to produce a desired effect

    “concern about the safety and efficacy of the vaccine”
Synonyms
efficaciousness
Source: Open English WordNet 2025 (CC BY 4.0) ↗
Scrabble score21points
Words With Friends22points
Word length8letters

02 Letter breakdown

How is EFFICACY spelled?

E1F2F3I4C5A6C7Y8
Starts withEFFFirst 3 letters
Ends withACYLast 3 letters
Unique letters6Repeats C, F
Vowel balance3 / 5Vowels / consonants
Popular spelling questions →8-letter words →Words starting with EFF →Words ending in ACY →Words made from EFFICACY →Words with A →Words with C →Words with E →Words with F →

03 Word-game status

Can you play EFFICACY?

Listed

UnscramblerHQ dictionary

This spelling is present in our broad English solver dictionary.

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Scrabble

Base tile value: 21 points. Confirm eligibility in the official word list used for your region and edition.

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Words With Friends

Base tile value: 22 points. Confirm eligibility inside the current game dictionary.

04 Related words

More words to explore.

effierce16 ptsdelicacy16 ptseffacers16 ptseffacing17 ptseffected17 ptseffecter16 ptseffector16 ptseffetely17 ptseffigial15 ptseffigies15 ptsadvocacy19 ptscelibacy17 pts

FAQ Quick answers

About EFFICACY.

How do you spell EFFICACY?

EFFICACY is spelled E-F-F-I-C-A-C-Y. It contains 8 letters.