The word ineffectually 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: 28
Highest Scoring Words With Friends™ Play In The Letters ineffectually
:
Seven Letter Word Alert: (35 words)
acetify, acutely, afflict, cauline, cleanly, cuneate, cutleaf, cutline, cyanite, eyelift, faculty, faintly, fancify, fancily, fateful, fiancee, fifteen, finally, fleetly, fluency, flyleaf, futiley, icefall, inflate, inflect, latency, leaflet, leucine, leucite, lineate, lunatic, nullify, nullity, unfitly, unleafy