pepperwort vs common garden cress

pepperwort and common garden cress both are nouns.

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

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

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

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

pepperwort (noun)	common garden 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