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