The word timeserver 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™ Plays In The Letters
Seven Letter Word Alert: (28 words)
eeriest, meeters, metrise, miterer, reemits, remeets, reserve, restive, retimer, retimes, retiree, retires, retrees, retries, retrims, reveres, reverie, reverse, reverts, reviser, riveter, severer, sievert, steerer, striver, teemers, trimers, trireme