Grinstein rhymes with:
aronstein, boeschenstein, braunstein, bronstein, grudenstein, lichtenstein, rubinstein, schottenstein, aronstein, augustine, bartlestein, boeschenstein, braunstein, brillstein, bronstein, buckstein, dobberstein, eckstein, epstein, ernestine, feuerstein, fierstein, finkelstein, fromstein, glickstein, goberstein, grubstein, grudenstein, hammerstein, holstein, lichtenstein, lipstein, mangosteen, nothstein, osteen, pfundstein, philistine, rubinstein, safferstein, schottenstein, silberstein, silverstein, springsteen, vogelstein, wasserstein, wetstein, wintersteen, zumstein
Grinstein sounds like:
germiston, gosornstem, greenstein, greenstone