borderland vs marchland

borderland and marchland both are nouns.

Word	Noun	Adjective	Verb	Adverb
borderland	Yes	No	No	No
marchland	Yes	No	No	No

As nouns, borderland and marchland are synonyms defined as:

borderland and marchland: district consisting of the area on either side of a border or boundary of a country or an area

Other synonyms of borderland include border district, march.

borderland (noun)	marchland (noun)
district consisting of the area on either side of a border or boundary of a country or an area	district consisting of the area on either side of a border or boundary of a country or an area