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