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