rocket cress vs yellow rocket

rocket cress and yellow rocket both are nouns.

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

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

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

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

rocket cress (noun)	yellow rocket (noun)
noxious cress with yellow flowers; sometimes placed in genus Sisymbrium	noxious cress with yellow flowers; sometimes placed in genus Sisymbrium