Lumberyard rhymes with:
appleyard, backyard, barnyard, boatyard, brickyard, churchyard, courtyard, dockyard, farmyard, ginyard, graveyard, hillyard, junkyard, schoolyard, shipyard, sinyard, stockyard, willyard, woodyard
Lumberyard sounds like:
lambert, lamberth, lamberti, lamberto, lamberty, lampert, lamport, lanford, lempert, limbert, limpert, linford, loma-prieda, lombard, lombardi, lombardo, lumbard, lumbert, lynford