Here's what rhymes with underventilating.
rating ventilating waiting indicating awaiting dating integrating mating debating grating insulating plating undulating weighting assimilating hating modulating simulating baiting dilating emulating gating intimating abating collating plaiting creating relating stating stimulating estimating educating emanating imitating isolating motivating updating agitating disintegrating escalating meditating mitigating oscillating skating annihilating bleating emigrating narrating tolerating vindicating accentuating authenticating automating deflating desolating enervating innovating instigating mutilating percolating scintillating operating alternating circulating generating penetrating regulating separating advocating dominating originating translating activating celebrating elevating formulating irritating liberating mediating radiating terminating alleviating allocating animating decorating disseminating equating hesitating navigating nominating perpetuating speculating delegating deviating dissipating germinating implicating incubating irrigating moderating negating perforating permeating postulating stipulating vacillating antedating denigrating encapsulating hibernating inflating interpolating masturbating nauseating obviating perpetrating prostrating renovating restating situating subjugating tabulating undeviating urinating fascinating contemplating cultivating devastating eliminating facilitating illustrating initiating investigating accelerating accommodating accumulating anticipating appreciating associating compensating complicating culminating fluctuating graduating manipulating precipitating propagating aggravating alienating articulating collaborating debilitating elaborating lubricating officiating suffocating validating aggregating ameliorating dedicating deliberating delineating deprecating duplicating enumerating eradicating excavating interrogating legislating legitimating obliterating recreating reiterating saturating segregating actuating attenuating consecrating corroborating explicating extricating fulminating impersonating inaugurating inoculating menstruating promulgating recirculating relegating resonating ruminating supplicating underestimating calculating demonstrating evaluating participating concentrating illuminating incorporating negotiating cooperating coordinating deteriorating differentiating discriminating humiliating appropriating captivating commemorating congratulating designating evaporating exhilarating intimidating invigorating necessitating proliferating reciprocating regenerating conciliating contaminating degenerating elucidating evacuating fabricating liquidating replicating subordinating adjudicating amalgamating coagulating confiscating depreciating dissociating electroplating emancipating enunciating extrapolating gravitating inactivating infuriating invalidating recuperating reinstating reverberating unhesitating communicating intoxicating approximating consolidating exaggerating predominating exasperating exterminating incriminating refrigerating repudiating exacerbating extenuating ingratiating preponderating remonstrating excruciating incapacitating rehabilitating substantiating Words that almost rhyme with underventilating
raging lading raiding raping trading shaping fading grading gaping pervading shading wading waging gauging paging taping braiding draping staging degrading persuading scraping upgrading evading blockading parading reshaping upbraiding engaging escaping invading cascading crusading downgrading masquerading disengaging raising laying racing railing raining reigning raking raving interlacing allaying making taking saying training breaking painting playing facing paying placing ranging saving amazing claiming failing gaining naming pertaining praying sailing shaking weighing attaining baking bathing blazing embracing entertaining framing gazing grazing tracing waking wasting waving basing blaming bracing casing chasing craving decaying delaying draining fainting flaming gaming mailing pacing paving praising shaving tasting trailing wailing waning appraising braking glazing partaking phrasing slaying whaling assailing availing awaking chafing chaining erasing feigning flaking hailing nailing pasting phasing plaything preying tailing taming veiling assaying bailing basting baying braving braying buffeting caving craning faking flailing graying haying hazing maiming neighing plaguing shaming waiving changing remaining obtaining undertaking retaining staying arranging scaling spacing staining surveying behaving betraying detailing obeying spraying straining swaying appertaining regaining scathing unfailing acquainting curtailing debasing detaining effacing quaking remaking renaming repaying staking straying unveiling bewailing declaiming defraying interchanging ordaining revelling strafing containing maintaining prevailing replacing complaining conveying displaying engraving modelling sustaining ascertaining campaigning proclaiming unchanging countervailing displacing mistaking portraying retraining unavailing abstaining entailing forsaking inhaling overtaking paraphrasing rearranging reclaiming refraining denaturing disclaiming disdaining inflaming overgrazing retracing explaining restraining constraining exclaiming disobeying mainspring remodelling uncomplaining exchanging