digitalis vs digoxin

digitalis and digoxin both are nouns.

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

As nouns, digoxin is a hyponym of digitalis; that is, digoxin is a word with a more specific, narrower meaning than digitalis:

digitalis: a powerful cardiac stimulant obtained from foxglove
digoxin: digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully

Other hyponyms of digitalis include digitoxin, Lanoxin.

digitalis (noun)	digoxin (noun)
any of several plants of the genus Digitalis	digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully
a powerful cardiac stimulant obtained from foxglove