The word breathtaking 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: 24
Highest Scoring Words With Friends™ Play In The Letters breathtaking
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Seven Letter Word Alert: (49 words)
abating, agatine, agitate, bargain, barking, bathing, batiker, battier, batting, bearing, beating, beatnik, benight, bethink, betting, bitrate, braking, breakin, gherkin, granite, habitat, hairnet, harking, hatting, hearing, heating, ingrate, keratin, knitter, nattier, nitrate, rainhat, ratbite, ratting, reaking, regatta, rethank, rethink, tabinet, tanager, tangier, tankage, tearing, terabit, thanker, thinker, tighten, tighter, trinket