Cycadales vs plant order

Cycadales and plant order both are nouns.

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

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

Cycadales: primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms
plant order: the order of plants

Cycadales (noun)	plant order (noun)
primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms	the order of plants