filet de boeuf en croute vs beef Wellington

filet de boeuf en croute and beef Wellington both are nouns.

Word	Noun	Adjective	Verb	Adverb
filet de boeuf en croute	Yes	No	No	No
beef Wellington	Yes	No	No	No

As nouns, filet de boeuf en croute and beef Wellington are synonyms defined as:

filet de boeuf en croute and beef Wellington: rare-roasted beef tenderloin coated with mushroom paste in puff pastry

filet de boeuf en croute (noun)	beef Wellington (noun)
rare-roasted beef tenderloin coated with mushroom paste in puff pastry	rare-roasted beef tenderloin coated with mushroom paste in puff pastry