Eucalyptus coriacea vs eucalypt

Eucalyptus coriacea and eucalypt both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eucalyptus coriacea	Yes	No	No	No
eucalypt	Yes	No	No	No

As nouns, eucalypt is a hypernym of Eucalyptus coriacea; that is, eucalypt is a word with a broader meaning than Eucalyptus coriacea:

Eucalyptus coriacea: small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips
eucalypt: a tree of the genus Eucalyptus

Other hypernyms of Eucalyptus coriacea include eucalyptus, eucalyptus tree.

Eucalyptus coriacea (noun)	eucalypt (noun)
small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips	a tree of the genus Eucalyptus