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