Undervalues rhymes with:
eigenvalues, eigenvalues, eigenvalues, values, values', w's, w.'s, w.s, argues, ceausescu's, compus, continues, curfews, debuts, donoghue's, eigenvalues, gorguze, grandnephews, mathews, matthew's, matthews, menus, nephew's, nephews, values, values', w's, w.'s, w.s