The word hyperthermal 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: 25
Highest Scoring Words With Friends™ Plays In The Letters hyperthermal
:
Seven Letter Word Alert: (28 words)
alerter, earthly, empathy, healthy, heather, heeltap, lamprey, lathery, leather, phthaly, preheat, prelate, prelaty, premelt, preterm, pteryla, realter, relater, relayer, replate, repleat, taperer, tempera, therapy, thermal, tramper, trample, yealmer