Psilophytales vs plant order

Psilophytales and plant order both are nouns.

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

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

Psilophytales: Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
plant order: the order of plants

Psilophytales (noun)	plant order (noun)
Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants	the order of plants