Here's what rhymes with orthopyroxene.

Consider these alternatives

anorthite / foresight albite / might plagioclase / case orthoclase / case enstatite / might sillimanite / might nepheline / feline forsterite / feet biotite / might underproduction / production actinolite / right microcline / line olivine / seen kyanite / might illite / right cordierite / feet amphibole / whole chalcocite / might sodalite / right selenite / might