grass fern vs Vittaria lineata

grass fern and Vittaria lineata both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass fern	Yes	No	No	No
Vittaria lineata	Yes	No	No	No

As nouns, grass fern and Vittaria lineata are synonyms defined as:

grass fern and Vittaria lineata: epiphytic fern found in lowland forests of tropical America

Other synonyms of grass fern include ribbon fern.

grass fern (noun)	Vittaria lineata (noun)
epiphytic fern found in lowland forests of tropical America	epiphytic fern found in lowland forests of tropical America