sward vs greensward

sward and greensward both are nouns.

Word	Noun	Adjective	Verb	Adverb
sward	Yes	No	No	No
greensward	Yes	No	No	No

As nouns, sward and greensward are synonyms defined as:

sward and greensward: surface layer of ground containing a mat of grass and grass roots

Other synonyms of sward include sod, turf.

sward (noun)	greensward (noun)
surface layer of ground containing a mat of grass and grass roots	surface layer of ground containing a mat of grass and grass roots