alpine milk vetch vs Astragalus alpinus

alpine milk vetch and Astragalus alpinus both are nouns.

Word	Noun	Adjective	Verb	Adverb
alpine milk vetch	Yes	No	No	No
Astragalus alpinus	Yes	No	No	No

As nouns, alpine milk vetch and Astragalus alpinus are synonyms defined as:

alpine milk vetch and Astragalus alpinus: perennial of mountainous areas of Eurasia and North America

alpine milk vetch (noun)	Astragalus alpinus (noun)
perennial of mountainous areas of Eurasia and North America	perennial of mountainous areas of Eurasia and North America