The word conchologist 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: 24
Highest Scoring Words With Friends™ Plays In The Letters conchologist
:
Seven Letter Word Alert: (22 words)
closing, cocoons, colonic, coltish, cooling, costing, gnocchi, gnostic, gothics, hooting, hosting, longish, loosing, looting, lotions, oncotic, ooliths, oolongs, shooing, soloing, sooting, tooling