The word decimeters 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
Seven Letter Word Alert: (38 words)
credits, crested, deceits, decrees, decries, deicers, demerit, diester, dieters, dimeter, directs, eeriest, emersed, emetics, erected, meeters, mercies, merited, metered, metrics, metrise, mitered, recedes, recited, recites, redeems, reedits, reemits, reested, remeets, retimed, retimes, seceder, secrete, seedier, steered, teemers, tridems