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