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