The word undeclared 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: 18
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (27 words)
adducer, candled, candler, cleaned, cleaner, cleared, cradled, cuddler, curdled, dandler, declare, deducer, deluder, denuder, educand, endured, launder, learned, nuclear, recaned, reclean, reduced, relaced, ulcered, uncared, unclear, unlaced