Expounding rhymes with:
compounding, impounding, pounding, abounding, astounding, bounding, compounding, confounding, founding, grounding, hounding, impounding, pounding, rebounding, resounding, rounding, sounding, surrounding
compounding, impounding, pounding, abounding, astounding, bounding, compounding, confounding, founding, grounding, hounding, impounding, pounding, rebounding, resounding, rounding, sounding, surrounding