Here's what rhymes with instigator.
cater gator gaiter later greater indicator waiter crater educator debater hater pater rater skater grater dater tater creator equator investigator traitor dictator agitator alligator insulator modulator navigator applicator decorator freighter integrator straighter violator prater vindicator collator dedicator gyrator litigator adulator castigator eradicator hibernator abrogator operator generator elevator mediator oscillator activator curator incubator moderator originator ventilator alternator aviator imitator innovator levator obturator rotator escalator excavator incinerator interrogator adjudicator animator detonator emulator fabricator idolater percolator annotator duplicator fornicator headwaiter lubricator pollinator dumbwaiter nominator fumigator inhalator mutilator sedater crocheter denominator translator legislator accelerator negotiator perpetrator radiator simulator speculator actuator carburetor evaporator illustrator procurator respirator stimulator gladiator cooperator eliminator exterminator infiltrator renovator exaggerator peculator corroborator insinuator arbitrator commentator coordinator regulator collaborator facilitator communicator evaluator manipulator demonstrator liquidator conciliator formulator dehydrator prognosticator prevaricator decelerator defoliator decapitator administrator refrigerator accumulator calculator defibrillator appropriator consolidator resuscitator dissimulator repudiator contaminator discriminator procrastinator expropriator Words that almost rhyme with instigator
caper nature major paper labor neighbor vapor taper sabre wager grader nadir saber pager raider tabor wader blockader raper wagerer trader scraper draper belabor denature persuader evader staider invader crusader legislature nomenclature masquerader gainer gayer gamer caver caner favor favour layer laser maker mayor painter safer sailor tailor glacier razor scalar wafer waiver baker fainter graver savor savour seiner taker baser hacer jailer maner payer purveyor raiser saver shaker waver chaser maser racer saner tamer vaguer whaler bather grayer jailor mailer pacer quaver shaver taster waster assayer baler faker greyer hazer chaster grazer quainter vainer baster fayer lamer raver sager claimer haler wailer fainer urbaner danger failure chamber player flavor breaker flavour labourer planar surveyor tracer trailer trainer manger savior appraiser attainder bilayer braver changer entertainer papier plainer ranger slayer spacer strainer arranger blazer eraser partaker planer slaver sprayer framer gamester declaimer frailer poetaster bracer defamer drainer essayer stayer staler delayer defacer opaquer wavier inaner unsafer behavior stranger container conveyor engraver retainer disclaimer disfavor disfavour misbehavior undertaker betrayer campaigner inhaler soothsayer conveyer modeller abstainer statelier automaker boilermaker cockchafer humaner semiquaver programer gainsayer naysayer saltshaker doomsayer loudhailer astuter finagler waylayer insaner remainder endanger exchanger monolayer multilayer complainer moneymaker restrainer semitrailer boneshaker troublemaker policymaker multiplayer photoengraver cabinetmaker