cittern vs cither

cittern and cither both are nouns.

Word	Noun	Adjective	Verb	Adverb
cittern	Yes	No	No	No
cither	Yes	No	No	No

As nouns, cittern and cither are synonyms defined as:

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

Other synonyms of cittern include cithern, citole, gittern.

cittern (noun)	cither (noun)
a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings	a musical stringed instrument with strings stretched over a flat sounding board; it is laid flat and played with a plectrum and with fingers
	a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings