The word chemoreceptor 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: 27
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (27 words)
cheerer, chomper, coercer, coherer, compere, compete, comport, compote, correct, creeper, crochet, emperor, erecter, erector, moocher, percher, premeet, preterm, proctor, promote, reerect, remoter, reperch, tempore, theorem, trochee, trooper