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