gittern vs cithern

gittern and cithern both are nouns.

Word	Noun	Adjective	Verb	Adverb
gittern	Yes	No	No	No
cithern	Yes	No	No	No

As nouns, gittern and cithern are synonyms defined as:

gittern and cithern: a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings

Other synonyms of gittern include cither, citole, cittern.

gittern (noun)	cithern (noun)
a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings	a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings