The word selenologies 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: 17
Highest Scoring Words With Friends™ Play In The Letters selenologies
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Seven Letter Word Alert: (26 words)
egoless, elegies, elegise, elogies, eloigns, geneses, genesis, glioses, goosies, illness, insoles, isogons, legions, legless, lesions, lingoes, lioness, loonies, loosens, loosing, losings, oleosin, selling, signees, singles, soloing