eucalypt vs eucalyptus tree

eucalypt and eucalyptus tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
eucalypt	Yes	No	No	No
eucalyptus tree	Yes	No	No	No

As nouns, eucalypt and eucalyptus tree are synonyms defined as:

Other synonyms of eucalypt include eucalyptus.

eucalypt (noun)	eucalyptus tree (noun)
a tree of the genus Eucalyptus	a tree of the genus Eucalyptus