peppermint vs eucalyptus

peppermint and eucalyptus both are nouns.

Word	Noun	Adjective	Verb	Adverb
peppermint	Yes	No	No	No
eucalyptus	Yes	No	No	No

As nouns, eucalyptus is a hypernym of peppermint; that is, eucalyptus is a word with a broader meaning than peppermint:

Other hypernyms of peppermint include eucalypt, eucalyptus tree.

peppermint (noun)	eucalyptus (noun)
a candy flavored with peppermint oil	a tree of the genus Eucalyptus
herb with downy leaves and small purple or white flowers that yields a pungent oil used as a flavoring	wood of any of various eucalyptus trees valued as timber
red gum tree of Tasmania