blanc vs bechamel sauce

blanc and bechamel sauce both are nouns.

Word	Noun	Adjective	Verb	Adverb
blanc	Yes	No	No	No
bechamel sauce	Yes	No	No	No

As nouns, bechamel sauce is a hypernym of blanc; that is, bechamel sauce is a word with a broader meaning than blanc:

blanc: a white sauce of fat, broth, and vegetables (used especially with braised meat)
bechamel sauce: milk thickened with a butter and flour roux

Other hypernyms of blanc include bechamel, white sauce.

blanc (noun)	bechamel sauce (noun)
a white sauce of fat, broth, and vegetables (used especially with braised meat)	milk thickened with a butter and flour roux