cisterna vs cistern

cisterna and cistern both are nouns.

Word	Noun	Adjective	Verb	Adverb
cisterna	Yes	No	No	No
cistern	Yes	No	No	No

As nouns, cisterna and cistern are synonyms defined as:

cisterna and cistern: a sac or cavity containing fluid especially lymph or cerebrospinal fluid

cisterna (noun)	cistern (noun)
a sac or cavity containing fluid especially lymph or cerebrospinal fluid	an artificial reservoir for storing liquids; especially an underground tank for storing rainwater
	a tank that holds the water used to flush a toilet
	a sac or cavity containing fluid especially lymph or cerebrospinal fluid