The word incompetently 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: 27
Highest Scoring Words With Friends™ Plays In The Letters incompetently
:
Seven Letter Word Alert: (37 words)
clement, compete, compile, content, ecotype, eminent, emptily, enocyte, entitle, epicyte, epitome, ineptly, inocyte, lection, lenient, linemen, mention, miocene, myeline, myeloic, neocyte, neotype, nepotic, nominee, nonepic, onetime, penlite, pentyne, petiole, pettily, pimento, polemic, pontine, ponymen, potency, telecom, topline