The word interacts 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: 13
Highest Scoring Words With Friends™ Play In The Letters interacts
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Seven Letter Word Alert: (41 words)
antsier, arcsine, arsenic, artiest, attires, canters, carnies, cattier, certain, cistern, citrate, cittern, cretins, cristae, instate, iratest, nastier, natters, nattier, nectars, nictate, nitrate, raciest, recants, restain, retains, retinas, retints, scanter, scatter, stainer, statice, straint, striate, tantric, tastier, tetanic, tinters, trances, transit, trisect