The word relativisms 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: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (67 words)
aimless, airiest, airless, airtime, armless, armlets, artless, elitism, estival, ilvaite, irisate, liaises, limiter, mailers, maltier, marlite, marvels, massive, masters, militar, misaver, misseat, missile, misters, mistier, mistral, realism, realist, relists, remails, resails, retails, revisit, rimless, sailers, saltier, salvers, satires, serials, servals, siltier, silvers, similar, similes, siriema, slaters, slatier, slavers, slimier, slivers, smartie, smilers, smilier, smiters, starves, stimies, stivers, stivier, streams, strives, tramels, travels, trivial, tsarism, verisms, verists, veritas