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