The word phytologists 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: 22
Highest Scoring Words With Friends™ Play In The Letters phytologists
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Seven Letter Word Alert: (30 words)
ghostly, glottis, goosish, gossipy, hotpots, hotspot, ooliths, otolith, pistols, plights, postils, potshot, shitpot, sightly, slights, soloist, soothly, sootily, spigots, spotlit, stylish, stylist, stylops, thistly, tightly, topsoil, tosspot, toyshop, tylosis, typists