herbs robert vs Geranium robertianum

herbs robert and Geranium robertianum both are nouns.

Word	Noun	Adjective	Verb	Adverb
herbs robert	Yes	No	No	No
Geranium robertianum	Yes	No	No	No

As nouns, herbs robert and Geranium robertianum are synonyms defined as:

herbs robert and Geranium robertianum: a sticky low herb with small reddish-purple flowers; widespread in the Northern Hemisphere

Other synonyms of herbs robert include herb robert, herb roberts.

herbs robert (noun)	Geranium robertianum (noun)
a sticky low herb with small reddish-purple flowers; widespread in the Northern Hemisphere	a sticky low herb with small reddish-purple flowers; widespread in the Northern Hemisphere