ostrich fern vs Onoclea struthiopteris

ostrich fern and Onoclea struthiopteris both are nouns.

Word	Noun	Adjective	Verb	Adverb
ostrich fern	Yes	No	No	No
Onoclea struthiopteris	Yes	No	No	No

As nouns, ostrich fern and Onoclea struthiopteris are synonyms defined as:

ostrich fern and Onoclea struthiopteris: tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes

ostrich fern (noun)	Onoclea struthiopteris (noun)
tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes	tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes