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