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