field of honor vs battleground

field of honor and battleground both are nouns.

Word	Noun	Adjective	Verb	Adverb
field of honor	Yes	No	No	No
battleground	Yes	No	No	No

As nouns, field of honor and battleground are synonyms defined as:

field of honor and battleground: a region where a battle is being (or has been) fought

Other synonyms of field of honor include battlefield, field, field of battle.

field of honor (noun)	battleground (noun)
the scene of a duel	a region where a battle is being (or has been) fought
a region where a battle is being (or has been) fought