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