Iris pseudacorus vs yellow iris

Iris pseudacorus and yellow iris both are nouns.

Word	Noun	Adjective	Verb	Adverb
Iris pseudacorus	Yes	No	No	No
yellow iris	Yes	No	No	No

As nouns, Iris pseudacorus and yellow iris are synonyms defined as:

Iris pseudacorus and yellow iris: common yellow-flowered iris of Europe and North Africa, naturalized in United States and often cultivated

Other synonyms of Iris pseudacorus include yellow flag, yellow water flag.

Iris pseudacorus (noun)	yellow iris (noun)
common yellow-flowered iris of Europe and North Africa, naturalized in United States and often cultivated	common yellow-flowered iris of Europe and North Africa, naturalized in United States and often cultivated