The word calorimeter 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™ Play In The Letters
Seven Letter Word Alert: (53 words)
alerter, aloetic, amercer, armoire, article, calorie, caroler, caterer, claimer, clearer, climate, coalier, coalite, coterie, creamer, creator, cremate, earlier, elector, emirate, erector, erotica, erratic, etaerio, loamier, maltier, marlite, mealier, meatier, metical, miracle, miterer, motlier, octamer, reactor, realter, realtor, recital, reciter, reclaim, recrate, relater, remoter, retimer, retrace, retrial, tearier, telecom, telomer, terrace, trailer, treacle, trireme