Here's what rhymes with umuu.
you u lieu lu rue loo yew yu ewe mieux ru mew roux to who do two new through too few true view due knew blue drew du grew que crew threw blew coup flew q qu shoe zu clue cue dew glue hue queue shew su sue tu undue vous accrue chew cu deux flue fu slew undo untrue zoo brew bu flu hu ju jus ku mu nu peu pew pu seu shu sou thru vu woo boo chou chu coo cou doo feu fue gu hew shou shrew thu tue vou vue wou wu clew goo moo pooh poo shoo gnu slue thew whew phew into screw anew renew ensue stew adieu ado piu skew sinew sprue tzu vnto askew imbue redo strew halloo spew valuer endue indue muumuu regrew achoo review pursue avenue bamboo canoe debut subdue taboo construe jusqu tattoo beaucoup eschew kangaroo outdo revue shampoo outgrew honeydew fondue foreknew zebu kazoo marabou wazoo booboo interview revenue overview residue withdrew rendezvous retinue caribou overdue overthrew overdo ballyhoo cockatoo bugaboo bestrew buckaroo overflew overshoe prevue overdrew overgrew atishoo hitherto barbecue hullabaloo barbeque peekaboo superglue misconstrue