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