Lepidium sativum vs pepper grass

Lepidium sativum and pepper grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lepidium sativum	Yes	No	No	No
pepper grass	Yes	No	No	No

As nouns, Lepidium sativum and pepper grass are synonyms defined as:

Lepidium sativum and pepper grass: annual herb used as salad green and garnish

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

Lepidium sativum (noun)	pepper grass (noun)
annual herb used as salad green and garnish	annual herb used as salad green and garnish