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