Here's what rhymes with ultraluminous.
luminous voluminous humanise albuminous dehumanise bituminous Words that almost rhyme with ultraluminous
ruinous luminance mutinous ruminants uveitis glutinous humanness ruefulness glutenous kookiness usefulness ludicrous humanists cumulus ruthlessness uselessness youthfulness rootlessness gruesomeness lutenists spookiness gratuitous truthfulness fruitfulness contumacious fruitlessness fumigants illusionists tunefulness humourlessness scrupulous lubricants untruthfulness pugilists duelists unscrupulous communicants nutriments