Olea europaea vs European olive tree

Olea europaea and European olive tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Olea europaea	Yes	No	No	No
European olive tree	Yes	No	No	No

As nouns, Olea europaea and European olive tree are synonyms defined as:

Olea europaea and European olive tree: evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits

Other synonyms of Olea europaea include olive.

Olea europaea (noun)	European olive tree (noun)
evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits	evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits