Here's what rhymes with jackknifes.
fifes Words that almost rhyme with jackknifes
knives wives arrives tithes dives hives fives chives derives drives thrives survives strives deprives contrives revives nice mice nights knights gneiss mites rights types sites vice writes lights rice whites heights likes pipes rites cites fights sights bites bytes dice lice dikes dykes bikes hikes kites pikes tights vise wipes ignites gripes smites price advice twice concise flights invites slice excise excites spice spikes thrice unites entice pints acolytes incites slights trice alights anchorites blights device precise strikes suffice delights stripes appetites dislikes archetypes splice maximise neophytes nonwhites phagocytes recites nitrites rewrites sprites indicts optimise stalagmites sacrifice paradise parasites satellites leukocytes dendrites minimise copyrights mobilise proselytes megabytes oversights publicise sidelights suburbanites underwrites lymphocytes metabolites prototypes criticise imprecise utilise stabilise trilobites legitimise stereotypes dentifrice electrolytes erythrocytes