Isoetales vs plant order

Isoetales and plant order both are nouns.

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

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

Isoetales: aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales
plant order: the order of plants

Isoetales (noun)	plant order (noun)
aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales	the order of plants