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