The word cohabitations 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: 22
Highest Scoring Words With Friends™ Play In The Letters cohabitations
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Seven Letter Word Alert: (32 words)
abiotic, absinth, abstain, actants, actions, atonias, atonics, attains, bastion, biotics, biotins, bitcoin, bosonic, botanic, cahoots, catboat, cations, cohabit, cohibit, cottons, habitat, iconist, inhabit, nicosia, obtains, octants, octoban, satanic, station, tabasco, titanic, tobiano