rock cress vs sicklepod

rock cress and sicklepod both are nouns.

Word	Noun	Adjective	Verb	Adverb
rock cress	Yes	No	No	No
sicklepod	Yes	No	No	No

As nouns, sicklepod is a hyponym of rock cress; that is, sicklepod is a word with a more specific, narrower meaning than rock cress:

Other hyponyms of rock cress include Arabis Canadensis, Arabis turrita, tower cress, tower mustard.

rock cress (noun)	sicklepod (noun)
any of several rock-loving cresses of the genus Arabis	North American rock cress having very long curved pods
	cosmopolitan tropical herb or subshrub with yellow flowers and slender curved pods; a weed; sometimes placed in genus Cassia