Spirodela polyrrhiza vs water flaxseed

Spirodela polyrrhiza and water flaxseed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spirodela polyrrhiza	Yes	No	No	No
water flaxseed	Yes	No	No	No

As nouns, Spirodela polyrrhiza and water flaxseed are synonyms defined as:

Spirodela polyrrhiza and water flaxseed: cosmopolitan except South America and New Zealand and some oceanic islands

Other synonyms of Spirodela polyrrhiza include great duckweed.

Spirodela polyrrhiza (noun)	water flaxseed (noun)
cosmopolitan except South America and New Zealand and some oceanic islands	cosmopolitan except South America and New Zealand and some oceanic islands