Thornburgh's rhymes with:
thornburg's, thornburghs, thornburgs, thornburg's, thornburghs, thornburgs, thornburg's, thornburghs, thornburgs, freedenberg's, greenberg's, hoffenberg's, katzenberg's, rittenberg's, rosenberg's, rosenbergs, steinberg's, thornburg's, thornburghs, thornburgs, wallenberg's
Thornburgh's sounds like:
thornberg, thornberry's, thornberrys, thornburg, thornburg's, thornburgh, thornburghs, thornburgs, thornbury's, thornburys, tranberg, turnovers