brown butter vs beurre noisette

brown butter and beurre noisette both are nouns.

Word	Noun	Adjective	Verb	Adverb
brown butter	Yes	No	No	No
beurre noisette	Yes	No	No	No

As nouns, brown butter and beurre noisette are synonyms defined as:

brown butter and beurre noisette: clarified butter browned slowly and seasoned with vinegar or lemon juice and capers

brown butter (noun)	beurre noisette (noun)
clarified butter browned slowly and seasoned with vinegar or lemon juice and capers	clarified butter browned slowly and seasoned with vinegar or lemon juice and capers