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