cockspur vs orchard grass

cockspur and orchard grass both are nouns.

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

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

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

Other synonyms of cockspur include cocksfoot, Dactylis glomerata.

cockspur (noun)	orchard grass (noun)
small spiny West Indian tree	widely grown stout Old World hay and pasture grass
widely grown stout Old World hay and pasture grass