bouillon vs broth

bouillon and broth both are nouns.

Word	Noun	Adjective	Verb	Adverb
bouillon	Yes	No	No	No
broth	Yes	No	No	No

As nouns, broth is a hypernym of bouillon; that is, broth is a word with a broader meaning than bouillon:

bouillon (noun)	broth (noun)
a clear seasoned broth	a thin soup of meat or fish or vegetable stock
	liquid in which meat and vegetables are simmered; used as a basis for e.g. soups or sauces