order Isospondyli vs Malacopterygii

order Isospondyli and Malacopterygii both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Isospondyli	Yes	No	No	No
Malacopterygii	Yes	No	No	No

order Isospondyli (noun)	Malacopterygii (noun)
most primitive teleost fishes, all are soft-finned: salmon, trout, herring, shad, sardines, anchovies, whitefish, smelts, tarpon	an extensive group of teleost fishes having fins supported by flexible cartilaginous rays