order Oleales vs plant order

order Oleales and plant order both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Oleales	Yes	No	No	No
plant order	Yes	No	No	No

As nouns, plant order is a hypernym of order Oleales; that is, plant order is a word with a broader meaning than order Oleales:

order Oleales: coextensive with the family Oleaceae; in some classifications included in the order Gentianales
plant order: the order of plants

order Oleales (noun)	plant order (noun)
coextensive with the family Oleaceae; in some classifications included in the order Gentianales	the order of plants