Here's what rhymes with prefumptuous.
presumptuous Words that almost rhyme with prefumptuous
voluptuous sumptuousness presumptuousness bumptiousness chumminess sodomise supplements suddenness subtilis humbleness supplicants succulence suffocates sultriness unctuousness crumminess drunkenness sustenance gluttonous truculence cussedness customised succulents accompanists subtenants bloodlessness colourlessness customise colourfulness gutlessness covenants trustfulness penultimates rambunctiousness obstructionists constructionists deconstructionists