The word endomorphic 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: 24
Highest Scoring Words With Friends™ Plays In The Letters endomorphic
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Seven Letter Word Alert: (34 words)
chirped, chomped, chomper, chorion, choroid, chromed, crimped, crooned, deciohm, demonic, dimorph, doormen, dormice, hemipod, hencoop, honored, hormone, incomer, ionomer, moocher, moodier, moorhen, moronic, morphed, morphic, morphon, omicron, phonier, phrenic, pinched, pincher, pooched, porched, porcine