Borenstein rhymes with:
fleckenstein, frankenstein, goldenstein, grabenstein, hartenstein, liechtenstein, lowenstein, rosenstein, wallenstein, brandenstein, brownstein, burnstein, feinstein, fleckenstein, frankenstein, goldenstein, grabenstein, greenstein, hartenstein, hornstein, liechtenstein, lowenstein, reinstein, rheinstein, rosenstein, wallenstein, weinstein
Borenstein sounds like:
barrington, bernstein, bornstein, braunstein, brewington, brimstone, brington, bronstein, bronston, brownstein, brownstone, bruington, burnstein, burrington