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