false pimpernel vs subshrub

false pimpernel and subshrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
false pimpernel	Yes	No	No	No
subshrub	Yes	No	No	No

As nouns, subshrub is a hypernym of false pimpernel; that is, subshrub is a word with a broader meaning than false pimpernel:

Other hypernyms of false pimpernel include suffrutex.

false pimpernel (noun)	subshrub (noun)
weedy plant having short dry chafflike leaves	low-growing woody shrub or perennial with woody base