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