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