The word thermograms 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: 21
Highest Scoring Words With Friends™ Play In The Letters thermograms
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Seven Letter Word Alert: (31 words)
armrest, earshot, garrets, garters, gathers, graters, grommet, hammers, hamster, hoarser, homages, maestro, marmots, mortars, mothers, rammers, reharms, reroast, rhetors, roamers, roaster, shammer, shorter, smarter, smother, stammer, storage, thermos, trammer, trasher, tremors