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