The word springtides 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 springtides
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Seven Letter Word Alert: (72 words)
designs, dieting, digests, digress, dingier, dingies, dirties, dissent, dissing, ditsier, editing, gipsies, ignited, igniter, ignites, inditer, indites, ingests, ingress, inserts, insider, insides, inspire, insteps, nitride, persist, pingers, pissier, pitiers, priding, priests, printed, pterins, resigns, respins, resting, ridings, riptide, risings, sidings, signers, signets, singers, sinters, snidest, snipers, spiders, spinets, spinier, spiring, spirits, spirted, spiting, spriest, springs, sprints, sprites, stinger, stipend, strides, strings, striped, stripes, tiderip, tidiers, tidings, tiepins, tiering, tigress, tinders, tipsier, tripeds