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