Here's what rhymes with impingement.
infringement Words that almost rhyme with impingement
pigment pendent endearment distant contingent indifferent digit enrichment indignant shipment stringent abridgment abridgement demised dimmest jennet fitment equipment limit minute brilliant inherent biggest ticket dearest insistent picket pivot astringent billet biscuit distanced enlistment bigot midget gymnast tippet bewitchment devilment encystment disenchant divot giblet spirit visit commitment efficient assistant nearest persistent witnessed deficient implicit malignant existent inefficient inhibit intermittent richest adherent millet fiercest fittest omniscient rivet triplet delimit diffident flippant grimaced wicket spigot brisket civet deliquescent gimlet limpet privet trinket grimmest officiant sickest stiffest weirdest inspirit reshipment slimmest trivet whippet briskest hiccoughed hippest nymphet sufficient consistent insufficient coherent fulfillment resistant simplest delinquent fulfilment cricket frigate illicit incoherent proficient strictest equidistant resilient skillet oviduct sublimate sincerest snippet swiftest maleficent outdistanced queerest reenlistment shrillest slickest austerest bedevilment dispirit coefficient explicit inconsistent prohibit reminiscent beneficent severest violinist coexistent complicit palimpsest transshipment preterit nonexistent cleverest nonmalignant nonresistant immunodeficient