The word irascibilities 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™ Play In The Letters irascibilities
:
Seven Letter Word Alert: (82 words)
abscise, abseils, actress, airiest, airless, albites, albitic, alibies, article, artless, ascites, ascribe, astilbe, baiters, barites, basters, bisects, bitsier, blaster, blastic, blister, braises, braless, breasts, bristle, cablers, caliber, calibre, carless, cartels, casters, castile, castles, ciliate, citable, clarets, cristae, eclairs, elastic, elicits, ileitis, irisate, italics, laciest, laicise, liaises, libates, raciest, racists, realist, rebaits, reblast, recasts, recital, reclass, relists, resails, retails, ribless, riblets, risible, sailers, saltier, satires, satiric, scabies, scalers, scalier, scarlet, scleras, scribal, scribes, serials, silicas, siltier, slaters, slatier, slicers, stabler, stables, triable, tribals