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