Synonyms for Rockcress (same or very similar meaning)
WordNet sense 1 (noxious cress with yellow flowers; sometimes placed in genus Sisymbrium):
yellow rocket, Barbarea vulgaris, rocket cress, Sisymbrium barbareaWordNet sense 2 (any of several rock-loving cresses of the genus Arabis):
rock cressFrom the ODE community, based on WordNetadd/edit