cistern vs cisterna

cistern and cisterna both are nouns.

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

As nouns, cistern and cisterna are synonyms defined as:

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

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