Lepidodendrales vs plant order

Lepidodendrales and plant order both are nouns.

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

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

Lepidodendrales: fossil arborescent plants arising during the early Devonian and conspicuous throughout the Carboniferous
plant order: the order of plants

Lepidodendrales (noun)	plant order (noun)
fossil arborescent plants arising during the early Devonian and conspicuous throughout the Carboniferous	the order of plants