Negotiator rhymes with:
appropriator, aviator, conciliator, gladiator, mediator, radiator, accelerator, accumulator, activator, actuator, administrator, agitator, alligator, allocator, alternator, animator, applicator, appropriator, arbitrator, aviator, calculator, carburetor, cogenerator, collaborator, commentator, communicator, conciliator, consolidator, coordinator, decorator, defibrillator, demonstrator, denominator, detonator, educator, elevator, escalator, evaporator, excavator, exterminator, fabricator, facilitator, generator, gladiator, illuminator, illustrator, imitator, incinerator, incubator, indicator, infiltrator, innovator, instigator, insulator, integrator, interrogator, investigator, irrigator, legislator, liquidator, litigator, locator, manipulator, mediator, moderator, modulator, navigator, operator, originator, oscillator, penetrator, percolator, perpetrator, pontificater, procrastinator, prognosticater, radiator, recuperater, refrigerator, regulator, renovator, respirator, simulator, speculator, stimulator, superfreighter, syndicator, telestrator, telustrator, terminator, ventilator, violator
Negotiator sounds like:
nastier, nectar, nester, nestor, neumeister, newscaster, nicastro, nichter, nicotera, nicotra, nighter, non-sequitor, nostra