The word thermocautery 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 thermocautery
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Seven Letter Word Alert: (70 words)
amercer, archery, armoury, autoecy, carroty, caterer, cattery, cautery, charmer, charter, chatter, cheater, coherer, creamer, creator, cremate, curator, curette, cutrate, ecthyma, erector, erratum, hectare, machete, marcher, matcher, maturer, mercury, octamer, outmate, outrace, outrate, ratchet, reacher, reactor, rechart, recheat, recrate, rectory, rematch, remoter, reroute, reteach, retouch, retrace, retract, retreat, reutter, teacher, temurah, terrace, theater, theatre, theorem, thereat, thereto, throaty, torture, toucher, tracery, tractor, treater, trochar, trochee, tutoree, tutorer, urethra, uromere, utterer, yachter