herbs robert vs herb robert

herbs robert and herb robert both are nouns.

Word	Noun	Adjective	Verb	Adverb
herbs robert	Yes	No	No	No
herb robert	Yes	No	No	No

As nouns, herbs robert and herb robert are synonyms defined as:

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

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

herbs robert (noun)	herb robert (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