Here's what rhymes with decolorizing.
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arriving deriving diving writhing tithing dicing knifing driving surviving pricing reviving thriving slicing conniving striving enticing splicing contriving sacrificing depriving apprenticing streptomycin writing dying fighting lying buying firing mining riding dining filing guiding hiding lighting lining shining timing abiding assigning biting citing hiring liking refining signing typing piling piping tying wiping wiring dyeing hiking rhyming siding sighing sighting tiring whining alighting aligning pining righting siting vying biding biking chiding fining liming whiting shying viking knighting retyping seining tiding wining finding trying binding providing applying crying flying smiling acquiring climbing combining deciding drying lightning sliding winding admiring relying residing retiring uniting ageing aspiring confining frying gliding obliging reciting compiling confiding plying priming prying resigning rewriting spying undying untiring bribing colliding divining minding styling twining blighting griping hireling nullifying repining rifling slighting sniping spiking eliding maligning opining priding striking underlying defining exciting declining denying designing dividing occupying supplying grinding inviting presiding reminding terrifying trifling blinding clarifying overlying overriding qualifying replying undermining unifying ascribing coinciding complying conspiring defying edifying expiring horrifying inciting reclining stifling striding underwriting verifying beguiling delighting glorifying igniting perspiring ratifying subsiding underlining decrying emulsifying reuniting unsmiling unwinding belying calcifying codifying deriding exiling indicting ossifying overwriting ramifying recombining typifying describing gratifying implying inspiring modifying multiplying classifying justifying reconciling signifying inclining purifying simplifying amplifying certifying disliking fancying notifying prophesying rectifying redefining disqualifying electrifying expediting falsifying inscribing intertwining pacifying redesigning solidifying stultifying subdividing uninviting acidifying crucifying enshrining liquefying putrefying unedifying unexciting vilifying specifying prescribing magnifying stereotyping subscribing testifying diversifying exemplifying fortifying mortifying transcribing beautifying mystifying stupefying uninspiring vivifying fructifying nonbinding personifying proscribing identifying satisfying intensifying quantifying sanctifying circumscribing objectifying unsatisfying indemnifying oversimplifying