Here's what rhymes with pentamethyl.
Words that almost rhyme with pentamethyl
missile missal civil initial official whistle chisel thistle fissile sisal uncivil riffle sizzle fizzle sniffle piffle beneficial judicial dismissal epistle unofficial gingival bristle drizzle swivel shrivel drivel gristle bellyful antimissile grizzle frizzle skiffle artificial superficial interstitial prejudicial nonjudicial nonofficial semiofficial sacrificial extrajudicial nonprejudicial middle nickel nipple nibble niggle little fiddle mingle riddle ripple sickle fickle nimble vigil virile chiral committal giggle pickle tickle tittle wiggle wriggle diddle sibyl tipple whittle chicle jiggle dibble kibble miscall pumpernickel piddle simple single signal symbol fiscal cheerful distal fearful brittle dismal familial pistol sinful triple pixel wilful acquittal cripple fitful kindle pedicle shingle tearful trickle willful abysmal belittle jingle liminal lintel quibble thimble tingle tinkle tinsel wrinkle cymbal dimple dribble griddle intermingle pistil spittle hymnal pimple prickle stipple commingle dingle mistral twiddle wimple schnitzel skittle winkle dirndl crystal provincial spindle ventricle lingual skillful baptismal minstrel twinkle wishful wistful dwindle scribble swindle noncommittal transmittal brimful fistful brindle crinkle timbrel unskillful vendible megacycle squiggle skinful basinful brimfull bilingual participle blissful sprinkle rekindle periwinkle oversimple surcingle paroxysmal monolingual multilingual sublingual cataclysmal