citole vs cithern

citole and cithern both are nouns.

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

As nouns, citole and cithern are synonyms defined as:

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

Other synonyms of citole include cither, cittern, gittern.

citole (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