blanc vs white sauce

blanc and white sauce both are nouns.

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

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

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

Other hypernyms of blanc include bechamel, bechamel sauce.

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