Here's what rhymes with preexisting.
existing listing assisting insisting consisting resisting twisting persisting enlisting coexisting subsisting Words that almost rhyme with preexisting
shifting sifting lifting lisping drifting sitting fitting hitting hinting hissing silting thinking filling fishing missing singing fixing shipping sinking fearing kissing knitting quitting shearing shilling sibling thinning whistling filming flitting pitting risking sinning sipping spitting tilting fiddling quilting searing glinting hitching lilting minting sieving slitting veering wilting living giving willing killing printing winning clearing linking mixing picking spinning swimming switching wishing bidding clinging committing digging piercing rearing ringing slipping splitting steering sticking swinging billing cheering chilling clicking clipping dipping emitting grinning inflicting kicking milling nearing omitting pitching rigging shrinking thrilling whipping befitting equipping flinging gearing gripping kidding licking milking pinning positing ripping skimming skipping sniffing spilling stinging stinking stitching ticking tipping afflicting chipping flicking flipping ridding rinsing scripting smearing sneering squinting tickling tiling tilling winking wringing affixing chiming clinking convicting dimming eclipsing evincing ginning grilling incising leering mincing nipping pickling refitting skidding skinning slinging spearing splinting sprinting sufficing swishing whittling whizzing wincing winging beginning building bringing appearing drinking conflicting convincing permitting admitting depicting drilling forbidding predicting restricting springing adhering bridging dismissing dripping forgiving stripping submitting blinking enriching kindling lynching pinching rethinking trickling trimming tripping twitching unthinking brimming cringing fringing gilding imprinting instilling limping pricking remitting reprinting stringing twinning unwitting consigning flinching refilling stripling swindling unwilling fulfilling interfering transmitting sprinkling distilling bewitching constricting counterfeiting impinging infringing misgiving abridging agonising babysitting reappearing reliving reminiscing disappearing pioneering rebuilding thanksgiving persevering unconvincing unremitting criticising electioneering profiteering unflinching unforgiving fingerprinting maximising minimising nonliving engineering contradicting domineering underpinning volunteering