fingerroot vs digitalis

fingerroot and digitalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
fingerroot	Yes	No	No	No
digitalis	Yes	No	No	No

As nouns, digitalis is a hypernym of fingerroot; that is, digitalis is a word with a broader meaning than fingerroot:

fingerroot: tall leafy European biennial or perennial having spectacular clusters of large tubular pink-purple flowers; leaves yield drug digitalis and are poisonous to livestock
digitalis: any of several plants of the genus Digitalis

Other hypernyms of fingerroot include foxglove.

fingerroot (noun)	digitalis (noun)
tall leafy European biennial or perennial having spectacular clusters of large tubular pink-purple flowers; leaves yield drug digitalis and are poisonous to livestock	any of several plants of the genus Digitalis
	a powerful cardiac stimulant obtained from foxglove