The word "kef" uses 3 letters: efk.

KEF is playable in:

Words With Friends10
Scrabble US10
Scrabble UK10

kef is a valid word in this word list. For a definition, see the external dictionary links below.

Try a search for kef in these online resources (some words may not be found):
Wiktionary - OneLook Dictionaries - Merriam-Webster - Google Search
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Words formed by adding one letter before or after kef (in bold), or to efk in any order:

a - fake11

c - feck14

y - fyke13

e - keef11

s - kefs11

r - kerf11

i - kief11

Shorter words found within efk

List all words that start with Q, adjectives that start with Q or find all 5 letter words starting with Q

List all words by word length, browse all words in the list, explore all combinations of letters or find all adjectives starting with a letter

Words with all letters different - Letter pairs and double letters - Hook Word Lists