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