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