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