pepperwort vs garden pepper cress

pepperwort and garden pepper cress both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepperwort	Yes	No	No	No
garden pepper cress	Yes	No	No	No

As nouns, pepperwort and garden pepper cress are synonyms defined as:

pepperwort and garden pepper cress: annual herb used as salad green and garnish

Other synonyms of pepperwort include common garden cress, Lepidium sativum, pepper grass.

pepperwort (noun)	garden pepper cress (noun)
annual herb used as salad green and garnish	annual herb used as salad green and garnish
any of several water ferns of the genus Marsilea having four leaflets