The word fingermark 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: 23
Highest Scoring Words With Friends™ Play In The Letters fingermark
:
Seven Letter Word Alert: (20 words)
angrier, earring, farming, fearing, firearm, fireman, framing, franker, fringer, grainer, mangier, mariner, marking, marring, ramekin, rangier, reaking, reaming, rearing, refrain