The word phytochemist 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 phytochemist
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Seven Letter Word Alert: (25 words)
chemist, chipset, chymist, copyist, cotypes, hitches, homiest, hospice, isohyet, isotype, miscopy, mistype, mopiest, myotics, pettish, pitches, poetics, potiche, potties, shitpot, society, styptic, timothy, tipmost, tiptoes