cesspool vs sump

cesspool and sump both are nouns.

Word	Noun	Adjective	Verb	Adverb
cesspool	Yes	No	No	No
sump	Yes	No	No	No

As nouns, cesspool and sump are synonyms defined as:

cesspool and sump: a covered cistern; waste water and sewage flow into it

Other synonyms of cesspool include cesspit, sink.

cesspool (noun)	sump (noun)
a covered cistern; waste water and sewage flow into it	a well or other hole in which water has collected
	an oil reservoir in an internal combustion engine
	a covered cistern; waste water and sewage flow into it