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