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