Eucalyptus globulus vs eucalypt

Eucalyptus globulus and eucalypt both are nouns.

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

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

Eucalyptus globulus: tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish
eucalypt: a tree of the genus Eucalyptus

Other hypernyms of Eucalyptus globulus include eucalyptus, eucalyptus tree.

Eucalyptus globulus (noun)	eucalypt (noun)
tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish	a tree of the genus Eucalyptus