order Umbellales vs plant order

order Umbellales and plant order both are nouns.

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

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

order Umbellales: plants having umbels or corymbs of uniovulate flowers; includes the Umbelliferae (chiefly herbs) and Cornaceae (chiefly trees or shrubs)
plant order: the order of plants

order Umbellales (noun)	plant order (noun)
plants having umbels or corymbs of uniovulate flowers; includes the Umbelliferae (chiefly herbs) and Cornaceae (chiefly trees or shrubs)	the order of plants