1adjective
marked by qualities giving the power to produce an intended effect
“the medicine is efficacious in stopping a cough”
01 Word definition
efficacious
11 letters · 6 vowels · 5 consonants
Is EFFICACIOUS a word?
Yes. EFFICACIOUS is a 11-letter adjective. marked by qualities giving the power to produce an intended effect Check the official dictionary for your particular word game before playing it.
Correct spelling
E-F-F-I-C-A-C-I-O-U-SHow do you spell EFFICACIOUS?
EFFICACIOUS contains 11 letters, begins with E, and ends with S.
Check another spelling →Meaning and definition
2adjective
producing or capable of producing an intended result or having a striking effect
“effective teaching methods”
Synonyms
Source: Open English WordNet 2025 (CC BY 4.0) ↗effectiveeffectual
02 Letter breakdown
How is EFFICACIOUS spelled?
E1F2F3I4C5A6C7I8O9U10S11
03 Word-game status
Can you play EFFICACIOUS?
UnscramblerHQ dictionary
This spelling is present in our broad English solver dictionary.
Scrabble
Base tile value: 21 points. Confirm eligibility in the official word list used for your region and edition.
Words With Friends
Base tile value: 24 points. Confirm eligibility inside the current game dictionary.
FAQ Quick answers
About EFFICACIOUS.
How do you spell EFFICACIOUS?
EFFICACIOUS is spelled E-F-F-I-C-A-C-I-O-U-S. It contains 11 letters.