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