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