Lecithin rhymes with:
donathan, johnathan, johnathon, jonathan, jonathon, jonothan, leviathan, mcclenathan, trevathan, anthon, blethen, bothun, brethen, cauthen, cauthon, cawthon, donathan, dothan, earthen, elizabethan, ethan, johnathan, johnathon, jonathan, jonathon, jonothan, kathan, lathan, lathon, laythan, lengthen, leviathan, louthan, mathan, mcclenathan, mcglothen, mcglothin, mckeithan, mckeithen, mckethan, midthun, mithun, mothon, nathan, pathan, ramthun, snethen, strengthen, swaminathan, trefethen, trevathan, warthen, wathen, witthuhn, worthen
Lecithin sounds like:
lactation, lactone, laughton, laxton, leichtman, leighton, lewiston, lichten, lichtman, ligation, lighten, liquidation, listen, liston, location, lockdown, logsdon, logston, lusitania, luxton