The word baroreceptor 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 baroreceptor
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Seven Letter Word Alert: (25 words)
abortee, aborter, carport, caterer, cerebra, corpora, creator, erector, october, operate, praetor, precoat, prerace, probate, proctor, prorate, reactor, rebater, rebrace, recrate, reprobe, retrace, taperer, terrace, trooper