The word abnegators 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 abnegators
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Seven Letter Word Alert: (29 words)
abaters, abators, abreast, agarose, argents, atoners, bangers, banters, baronet, boaster, boaters, borages, boranes, borates, brogans, eartags, garnets, nosebag, onstage, oranges, reboast, senator, sorbate, storage, strange, tanager, teabags, teargas, treason