keeper vs steward

keeper and steward both are nouns.

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

As nouns, keeper and steward are synonyms defined as:

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

Other synonyms of keeper include custodian.

keeper (noun)	steward (noun)
one having charge of buildings or grounds or animals	someone who manages property or other affairs for someone else
someone in charge of other people	a union member who is elected to represent fellow workers in negotiating with management
	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