princess feather vs subshrub

princess feather and subshrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
princess feather	Yes	No	No	No
subshrub	Yes	No	No	No

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

princess feather: annual with broadly ovate leaves and slender drooping spikes of crimson flowers; southeastern Asia and Australia; naturalized in North America
subshrub: low-growing woody shrub or perennial with woody base

Other hypernyms of princess feather include suffrutex.

princess feather (noun)	subshrub (noun)
annual with broadly ovate leaves and slender drooping spikes of crimson flowers; southeastern Asia and Australia; naturalized in North America	low-growing woody shrub or perennial with woody base