steward vs keeper

steward and keeper both are nouns.

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

As nouns, steward and keeper are synonyms defined as:

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

Other synonyms of steward include custodian.

steward (noun)	keeper (noun)
someone who manages property or other affairs for someone else	one having charge of buildings or grounds or animals
a union member who is elected to represent fellow workers in negotiating with management	someone in charge of other people
one having charge of buildings or grounds or animals
an attendant on an airplane
the ship's officer who is in charge of provisions and dining arrangements