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