Here's what rhymes with undercloud.
crowd cloud loud allowed proud aloud bowed vowed ploughed plowed shroud sowed cowed sourdough becloud thundercloud wowed trowed avowed overcrowd overcloud resowed endowed disallowed enshroud powwowed cornrowed disavowed houseproud snowplowed snowploughed Words that almost rhyme with undercloud
rout clout crouch grout lout grouch kraut doubt shout couch drought tout trout bout gout pouch toute vouch flout gouge pout slouch nowt about throughout stout scout ahout snout spout sprout redoubt sauerkraut avouch logout without devout turnabout debouch layabout mangetout roundabout thereabout hereabout knockabout marabout runabout waterspout downspout gadabout beansprout roustabout walkabout ground round crowned underground roused growled aground clowned yowled found around bound sound pound wound aroused drowned frowned housed lb mound hound howled mouthed browned downed fouled lounged browsed gouged prowled gowned uncrowned drowsed dowsed turnround moused fowled abound renowned surround unsound rebound unbound resound scowled turnaround redound unwound astound rewound scrounged overground rockbound showground profound confound espoused expound battleground inbound newfound propound impound wraparound befouled icebound loudmouthed runaround closemouthed fogbound foulmouthed newshound dumfound ultrasound hardbound housebound widemouthed wolfhound strikebound musclebound