The word compartmental 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: 27
Highest Scoring Words With Friends™ Play In The Letters compartmental
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Seven Letter Word Alert: (68 words)
almoner, aptamer, caltrap, caltrop, cantrap, caramel, central, clammer, clamper, clatter, clotter, coalman, coalmen, coaltar, coatman, comment, compare, compart, corneal, cornett, crampon, enactor, lactate, lactone, lampman, lampmen, macrame, manacle, mantrap, mottler, narcoma, nepotal, oatmeal, octamer, operant, paceman, palmate, pattern, placate, planeta, plantar, planter, platter, plotter, polecat, portent, portlet, prattle, precoat, pronate, protean, protect, rampant, reclamp, replant, repoman, retotal, romance, ropeman, tapeman, tartpan, teacart, tonearm, torment, tramman, trammel, trample, trommel