The word mycophagists 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 mycophagists
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Seven Letter Word Alert: (39 words)
atomics, chamois, chymist, compass, copyist, cystoma, cytomas, cytosis, goatish, gossipy, gotchas, gothics, gothism, haptics, impacts, impasto, isopach, mascots, miscast, miscopy, mishaps, mispays, mosaics, mycosis, myotics, mystics, oghamic, opacity, physics, potamic, psychos, sitcoms, somatic, sophtas, spasmic, spastic, spigots, stigmas, stomach