The word calipered 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: 17
Highest Scoring Words With Friends™ Play In The Letters calipered
:
Seven Letter Word Alert: (23 words)
caliper, capered, cleared, declare, decrial, lipread, pearled, pedicel, pedicle, periled, pierced, pleader, predeal, predial, radicel, radicle, relaced, repaced, repiled, replace, replead, replica, replied