Here's what rhymes with cointreau.
low blow pro row lo ro yo roe yeux bro rho trow no so know go though below show co flow grow slow throw tho fo foe glow ho bo doe dough fro mo po toe wo woe crow thro tow beau bio ceux faut goe hoe jo ko sew soe vo beaux cho dau floe mow noe sho tuo zo throe sloe tarot whoa doh borzoi although ago snow embryo plateau quo audio hello nouveau polio propos tableau uno aglow dicho outgrow tableaux topos dunno plateaux stow trousseau oleo turbot deathblow kayo matzoh pekoe trousseaux schmo resew schmoe ratio radio undergo bestow buffalo chateau folio indigo patio stereo forego forgo aliquot apropos cameo domino escrow medico rodeo siglo chateaux chapeau kapok piccolo undertow foreknow regrow bandeau gateau pompano chapeaux fatso gateaux romeo tallyho overthrow studio overflow portico bungalow calico dynamo vertigo mistletoe spatio afterglow adagio overgrow microdot portfolio politico presidio oregano mustachio moustachio archipelago impresario pistachio braggadocio pianissimo generalissimo