The word microchiroptera 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: 29
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (95 words)
accompt, airport, airtime, apricot, armoire, armorer, camphor, campier, carport, carrier, catcher, ceramic, chaotic, chapter, charier, chariot, charmer, charter, chimera, chirper, choicer, chomper, chromic, coactor, cochair, cometic, compact, compare, compart, comport, compote, corpora, correct, creator, crimper, crochet, ectopia, ectopic, empiric, erotica, erratic, hairier, haricot, hepatic, hoarier, icteric, impeach, itchier, marcher, marrier, matcher, meiotic, moocher, morphic, octamer, octarch, ootheca, picrate, picrite, pitcher, pithier, poacher, porotic, portico, potamic, potiche, practic, praetor, prairie, precoat, pricier, primate, proctor, promote, prootic, prorate, racemic, reactor, recatch, rechart, rematch, repatch, repitch, roomier, taproom, tarrier, tearoom, terroir, thermic, toparch, tramper, triarch, trochar, trooper, trophic