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