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