French bean vs haricots verts

French bean and haricots verts both are nouns.

Word	Noun	Adjective	Verb	Adverb
French bean	Yes	No	No	No
haricots verts	Yes	No	No	No

As nouns, French bean and haricots verts are synonyms defined as:

Other synonyms of French bean include haricot vert.

French bean (noun)	haricots verts (noun)
very small and slender green bean	very small and slender green bean