narrow-leaved spleenwort vs Athyrium pycnocarpon

narrow-leaved spleenwort and Athyrium pycnocarpon both are nouns.

Word	Noun	Adjective	Verb	Adverb
narrow-leaved spleenwort	Yes	No	No	No
Athyrium pycnocarpon	Yes	No	No	No

As nouns, narrow-leaved spleenwort and Athyrium pycnocarpon are synonyms defined as:

narrow-leaved spleenwort and Athyrium pycnocarpon: North American fern with narrow fronds on yellowish leafstalks

Other synonyms of narrow-leaved spleenwort include Diplazium pycnocarpon, glade fern, silvery spleenwort.

narrow-leaved spleenwort (noun)	Athyrium pycnocarpon (noun)
North American fern with narrow fronds on yellowish leafstalks	North American fern with narrow fronds on yellowish leafstalks