The word decolourised 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: (78 words)
ceroids, clodder, closure, clouded, coddler, coddles, colours, coolers, coulees, coursed, creoles, creosol, croodle, cruised, cuddies, cuddler, cuddles, curdled, curdles, decider, decides, deciles, decoder, decodes, decolor, decried, decries, deducer, deduces, deicers, delouse, deluder, deludes, derides, desired, dildoes, diocese, discord, doodler, doodles, drooled, duelers, eluders, leisure, lousier, oilseed, orioles, reclose, recluse, recoded, recodes, recoils, recused, reduced, reduces, reoiled, rescued, resided, residue, reslice, resoled, riddles, rodeoed, ruddies, scolded, scolder, scoured, seclude, secured, seduced, seducer, sledder, sluiced, sluicer, soddier, soldier, sourced, ulcered