cress vs cress plant

cress and cress plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
cress	Yes	No	No	No
cress plant	Yes	No	No	No

As nouns, cress and cress plant are synonyms defined as:

cress and cress plant: any of various plants of the family Cruciferae with edible leaves that have a pungent taste

cress (noun)	cress plant (noun)
pungent leaves of any of numerous cruciferous herbs	any of various plants of the family Cruciferae with edible leaves that have a pungent taste
any of various plants of the family Cruciferae with edible leaves that have a pungent taste