The word identifiers is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 16
Highest Scoring Words With Friends™ Play In The Letters identifiers
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Seven Letter Word Alert: (39 words)
defiers, definer, defines, deifier, deifies, deities, deniers, destine, diester, dieters, dieties, dietine, dirties, ditsier, edifier, edifies, entries, fenders, finders, friends, inditer, indites, insider, iridise, niftier, nitride, reedits, refinds, refined, refines, reified, reifies, snifter, sterned, tenders, tidiers, tinders, trienes, trifids