Here's what rhymes with avault.
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 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 nouveau uno tuo bro chateaux trow chapeau tarot kayo matzoh chapeaux fatso borzoi resew below ratio plateau bestow buffalo folio patio forego forgo aglow aliquot cameo dicho escrow siglo topos dunno plateaux trousseau adagio kapok oleo turbot deathblow foreknow bandeau gateau gateaux pekoe trousseaux tallyho radio overthrow studio undergo overflow stereo calico polio propos tableau vertigo apropos domino outgrow rodeo spatio tableaux afterglow undertow overgrow regrow romeo embryo indigo bungalow dynamo medico mistletoe piccolo pistachio pompano mustachio moustachio portico presidio oregano pianissimo microdot portfolio politico braggadocio archipelago impresario generalissimo