The word 
is a valid scrabble word
2 short excerpts of WikWik.org (WikWik is an online database of words defined in the English, French, Spanish, Italian, and other Wiktionnaries.)
- efficacy n. Ability to produce a desired effect under ideal testing conditions.
- efficacy n. Degree of ability to produce a desired effect; effectiveness.
12 valid words from 2 definitions
ABILITY CONDITIONS DEGREE DESIRED EFFECT EFFECTIVENESS IDEAL OF PRODUCE TESTING TO UNDER
2 words-in-word (Words found as is inside the word.)
3 words-in-word RTL (Words found written from right to left, inside the word.)
One prefix (New word found by adding one or more letters in front of the word.)
Scrabble scoring
- 21 points.
Other languages
Categories without words
- No anagrams (Word found by changing the order of the letters.)
- No cousins (Word found by changing only one letter.)
- No lipograms (Word found when removing only one letter.)
- No epentheses (Word found when adding only one letter.)
- No suffixes (Word found by adding one or more letters at the end of the word.)
- Not found in the middle (Word found by adding letters in front and at the end of the word.)
- No anagrams can be formed with an extra letter (New word formed with all the letters of the word and an extra letter.)
- No anagrams can be formed by removing a letter (New word formed with all the letters of the word minus a letter.)
Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
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Recommended websites
- Visit WikWik.org - the word
is in the WikWik, see all the details (2 definitions). - www.BestWordList.com to create personalized word lists.
- www.BestWordClub.com to play duplicate online scrabble.
- Ortograf.ws to look for words.
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