cocksfoot vs orchard grass

cocksfoot and orchard grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocksfoot	Yes	No	No	No
orchard grass	Yes	No	No	No

As nouns, cocksfoot and orchard grass are synonyms defined as:

cocksfoot and orchard grass: widely grown stout Old World hay and pasture grass

Other synonyms of cocksfoot include cockspur, Dactylis glomerata.

cocksfoot (noun)	orchard grass (noun)
widely grown stout Old World hay and pasture grass	widely grown stout Old World hay and pasture grass