Agrostis nebulosa vs cloud grass

Agrostis nebulosa and cloud grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agrostis nebulosa	Yes	No	No	No
cloud grass	Yes	No	No	No

As nouns, Agrostis nebulosa and cloud grass are synonyms defined as:

Agrostis nebulosa and cloud grass: Spanish grass with light feathery panicles grown for dried bouquets

Agrostis nebulosa (noun)	cloud grass (noun)
Spanish grass with light feathery panicles grown for dried bouquets	Spanish grass with light feathery panicles grown for dried bouquets