Gremillion rhymes with:
gomillion, etheljean, gomillion, arakelian, australian, battalion, billion, boullion, brazilian, bullion, castrillon, civilian, crocodilian, dillion, etheljean, filion, fillion, gallion, gomillion, gullion, hillian, italian, jillion, killian, killion, mccallion, mcmillian, mcmillion, medallion, million, multibillion, multimillion, octillion, papillion, pavilion, pavillion, pillion, pygmalion, quillian, rebellion, reptilian, scallion, scullion, somalian, stallion, stillion, trevelyan, trillion, vaudevillian, vermilion, vermillion, zillion