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