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