The word ungarmented 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 ungarmented
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Seven Letter Word Alert: (47 words)
amender, angered, augment, denture, derange, detuner, dragnet, endgame, enraged, garment, gatemen, gaunted, gaunter, germane, granted, grantee, greaten, grenade, grunted, gumtree, manured, matured, meander, mundane, mutagen, natured, negated, reagent, reamend, regnant, remated, remnant, renamed, retuned, tenured, trudgen, unarmed, uneager, unearnt, uneaten, unmated, unmeant, unmerge, unnamed, unrated, untamed, untread