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