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