rockcress vs rocket cress

rockcress and rocket cress both are nouns.

Word	Noun	Adjective	Verb	Adverb
rockcress	Yes	No	No	No
rocket cress	Yes	No	No	No

As nouns, rockcress and rocket cress are synonyms defined as:

rockcress and rocket cress: noxious cress with yellow flowers; sometimes placed in genus Sisymbrium

Other synonyms of rockcress include Barbarea vulgaris, Sisymbrium barbarea, yellow rocket.

rockcress (noun)	rocket cress (noun)
any of several rock-loving cresses of the genus Arabis	noxious cress with yellow flowers; sometimes placed in genus Sisymbrium
noxious cress with yellow flowers; sometimes placed in genus Sisymbrium