The word tangentially 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: 20
Highest Scoring Words With Friends™ Play In The Letters tangentially
:
Seven Letter Word Alert: (27 words)
agatine, agilely, agitate, alanine, allying, analyte, anginal, antigen, elating, gallant, gallate, gelatin, genital, gentian, inanely, leaning, letting, nattily, netting, tagline, tangent, telling, tenting, tillage, yealing, yeaning, yelling