The word gyrocompasses 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: 26
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (37 words)
campers, cargoes, compare, compass, compose, corpses, corsage, crosses, cypress, escarps, gaspers, gassers, geomaps, grasses, grosses, moorage, mossery, mycoses, oosperm, ospreys, parsecs, passers, pessary, poromas, poroses, process, prosoma, scamper, scapose, scooper, scrapes, screams, screamy, scrooge, searoom, soapers, spacers