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