Here's what rhymes with copos.
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 kapok whoa gateau gateaux although below ago flow grow slow snow throw glow quo audio fro chateau crow thro uno dicho floe rodeo chateaux dunno throe chapeau oleo sloe tarot turbot kayo chapeaux pekoe borzoi schmo schmoe radio plateau bestow folio hello patio forego forgo nouveau polio propos tableau aglow cameo outgrow tableaux plateaux trousseau deathblow bandeau matzoh fatso trousseaux microdot romeo resew ratio embryo overthrow studio undergo buffalo overflow indigo stereo calico dynamo vertigo aliquot apropos domino escrow medico siglo spatio adagio piccolo undertow foreknow overgrow regrow tallyho portico bungalow mistletoe afterglow oregano pompano portfolio politico presidio pistachio mustachio moustachio archipelago braggadocio pianissimo impresario generalissimo