The word irrelevances 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: 21
Highest Scoring Words With Friends™ Plays In The Letters irrelevances
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Seven Letter Word Alert: (93 words)
arcsine, arrives, arsenic, averser, careens, careers, carnies, carries, carvers, caverns, caviler, cereals, clavier, cleaner, cleanse, clearer, cleaver, cleaves, cravers, creaser, earlier, earners, eclairs, elevens, enclave, enslave, enviers, evinces, inverse, lancers, laveers, leaners, learner, leavens, leavers, leerier, license, nailers, nervier, ravines, realers, realise, rearise, reavers, recanes, receive, reclean, recline, reelers, relaces, relearn, release, reliers, relieve, relines, relives, renails, renerve, rerinse, rescale, reserve, reslice, reveals, reveler, reveres, reverie, reverse, reviler, reviles, reviser, scalene, scalier, scarier, sclerae, serener, service, servile, several, severer, silence, sincere, snarler, sneerer, valence, varices, veilers, velaric, veneers, veneral, versine, vesical, vesicle, viscera