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