cistern
cis-tern
noun
A tank for storing water, often part of a toilet or for collecting rainwater.
"The toilet cistern was leaking slightly."
Thesaurus
Synonyms: water tank, cisterna
cis-tern
A tank for storing water, often part of a toilet or for collecting rainwater.
"The toilet cistern was leaking slightly."
Synonyms: water tank, cisterna