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