The word unhesitating 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: 19
Highest Scoring Words With Friends™ Plays In The Letters unhesitating
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Seven Letter Word Alert: (58 words)
anguish, antigen, asinine, atheist, attunes, augites, aunties, ensuing, gentian, guanine, guineas, hatting, heating, hinnies, hinting, hitting, hunting, husting, hutting, ignites, insight, instant, instate, intents, intuits, nesting, netting, nightie, nutting, seating, setting, shining, sinuate, sitting, situate, stating, suiting, tangent, tannest, tasting, tautens, tauting, teasing, tenants, tensing, tenting, testing, tetanus, tighten, tiniest, tinting, tithing, tunings, unhinge, unities, uniting, unstage, unstain