The word centimeters 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™ Plays In The Letters
Seven Letter Word Alert: (46 words)
cements, centers, centres, cistern, cittern, cretins, eeriest, emetics, emitter, enemies, enteric, enticer, entices, entrees, entries, itemset, meeters, mercies, metrics, metrise, metrist, mincers, minters, mittens, netters, recites, reemits, remeets, remines, remints, retimes, retints, scenter, secrete, sincere, smitten, teemers, teenier, teeters, tenters, tentier, termite, testier, tinters, trienes, trisect