custodian vs keeper

custodian and keeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
custodian	Yes	No	No	No
keeper	Yes	No	No	No

As nouns, custodian and keeper are synonyms defined as:

custodian and keeper: one having charge of buildings or grounds or animals

Other synonyms of custodian include steward.

custodian (noun)	keeper (noun)
one having charge of buildings or grounds or animals	one having charge of buildings or grounds or animals
	someone in charge of other people