The word wintertimes 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: (55 words)
emitter, entries, entwist, interim, intwist, itemise, itemset, metrise, metrist, minters, mintier, mistier, misween, miswent, miswire, mitiest, mittens, netters, newsier, nitrite, nittier, nitwits, reemits, remines, remints, retimes, retints, retwine, retwist, smitten, tenters, tentier, termini, termite, testier, tiniest, tinters, tintier, trienes, twiners, twinset, twister, weiners, western, wetters, wieners, wienies, winiest, winters, wiremen, wiriest, wisemen, witters, wittier, written