Here's what rhymes with unparsimonious.
parsimonious harmonious erroneous acrimonious ceremonious felonious unceremonious inharmonious sanctimonious disharmonious Words that almost rhyme with unparsimonious
copious commodious coleus nosiness associates holiness loneliness melodious cosiness coziness unholiness mouldiness gaucheness moldiness doziness opprobrious ghostliness folksiness dissociates incommodious disassociates defoliates defoliants exfoliates