Filicopsida vs fern

Filicopsida and fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
Filicopsida	Yes	No	No	No
fern	Yes	No	No	No

Filicopsida (noun)	fern (noun)
ferns	any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores