The word geophysicists 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: 25
Highest Scoring Words With Friends™ Play In The Letters geophysicists
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Seven Letter Word Alert: (33 words)
cesspit, chipset, copyist, cosiest, cotypes, cytosis, egoists, gipsies, gossips, gossipy, gothics, gypsies, hissies, hogties, hospice, hostess, isohyet, isotype, oecists, physics, pitches, poetics, possets, potiche, psyches, psychos, schists, scythes, septics, society, spigots, stogeys, stogies