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