herba impia vs Filago germanica

herba impia and Filago germanica both are nouns.

Word	Noun	Adjective	Verb	Adverb
herba impia	Yes	No	No	No
Filago germanica	Yes	No	No	No

As nouns, herba impia and Filago germanica are synonyms defined as:

herba impia and Filago germanica: (literally an undutiful herb) a variety of cotton rose

herba impia (noun)	Filago germanica (noun)
(literally an undutiful herb) a variety of cotton rose	(literally an undutiful herb) a variety of cotton rose