marsh fern vs Thelypteris palustris

marsh fern and Thelypteris palustris both are nouns.

Word	Noun	Adjective	Verb	Adverb
marsh fern	Yes	No	No	No
Thelypteris palustris	Yes	No	No	No

As nouns, marsh fern and Thelypteris palustris are synonyms defined as:

marsh fern and Thelypteris palustris: fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions

Other synonyms of marsh fern include Dryopteris thelypteris.

marsh fern (noun)	Thelypteris palustris (noun)
fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions	fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions