Bouillon is a thin, clear soup; usually of beef: “At The bouillon served at the party was the best I have ever had.”
Bullion, on the other hand, is ‘gold or silver in bars or plates, but not in coin formats’: “Banks store large quantities of bullion”
Explore More Usage Tips:
Bouillon – Can be remebered with Boil , ie to boil the water with meat to get the soup
Bullion – Can be remembered with Bull mark on the Gold /Silver Bars