Buttermilk rhymes with:
loudermilk, loudermilk, loudermilk, balke, behlke, beilke, bel'c, belk, belke, bielke, bilk, boehlke, bulk, dahlke, dalke, delk, ehlke, elk, engelke, falck, folck, foulk, foulke, fulk, gaulke, gruhlke, grulke, helke, holck, hulk, ilk, loudermilk, lowdermilk, milk, milke, oehlke, oelke, paulk, pelc, roelke, schielke, schilke, schlegelmilch, schuelke, selk, selke, silk, skulk, sulk, talc, thielke, visicalc, volk, walck, welk, welke, wilk, wilke, wolke, zielke, zuehlke, zuelke, zuhlke