blue-eyed grass vs Sisyrinchium

blue-eyed grass and Sisyrinchium both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue-eyed grass	Yes	No	No	No
Sisyrinchium	Yes	No	No	No

blue-eyed grass (noun)	Sisyrinchium (noun)
plant with grasslike foliage and delicate blue flowers	chiefly North American grasslike herbs