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