orchard grass vs cockspur

orchard grass and cockspur both are nouns.

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

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

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

Other synonyms of orchard grass include cocksfoot, Dactylis glomerata.

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