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