Here's what rhymes with ornithorhynchi.
Words that almost rhyme with ornithorhynchi
ninety likely tiny finely lightly lively rightly shiny wryly limy piney piny whiny limey lithely ripely lichee highly slightly widely kindly mighty tightly brightly nicely psyche wisely blindly nightly tidy almighty dryly knightly shyly slimy sprightly widi wily blithely grimy hyphae slyly spiny flighty wifely pricey vilely wiki dicey nightie sightly supinely whitey nighty showily siree vaginae sprightlier tritely blimey spryly chivy crikey stripey knightlier sightlier unlikely mildly politely timely wildly divinely spicy benignly feisty forthrightly spiky uprightly smiley stymie snidely spiry styli skivvy feistier stymy precisely inquiry enquiry unsightly untidy expiry unkindly unwisely sublimely chenille impolitely eruditely unsightlier untimely concisely contritely imprecisely bolsheviki