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There are 5 fourteen-letter words containing EFFI

HYPEREFFICIENThyperefficient adj. Extremely efficient.
HYPEREFFICIENT adj. excessively efficient.
INEFFICACITIESINEFFICACITY n. lack of power to produce a desired effect, also INEFFICACY.
INEFFICIENCIESinefficiencies n. Plural of inefficiency.
INEFFICIENCY n. the state of being inefficient.
SUPEREFFICIENTsuperefficient adj. Very efficient.
SUPEREFFICIENT adj. extremely efficient.
ULTRAEFFICIENTultraefficient adj. Extremely efficient; of utmost efficiency.
ULTRAEFFICIENT adj. extremely efficient.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.

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See this list for:

  • English Wiktionary: 11 words
  • Scrabble in French: 5 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 1 word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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