nurse vs keeper

nurse and keeper both are nouns.

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

As nouns, keeper is a hypernym of nurse; that is, keeper is a word with a broader meaning than nurse:

Other hypernyms of nurse include adult female, woman.

nurse (noun)	keeper (noun)
one skilled in caring for young children or the sick (usually under the supervision of a physician)	one having charge of buildings or grounds or animals
a woman who is the custodian of children	someone in charge of other people

nurse (verb)	keeper (verb)
try to cure by special care of treatment, of an illness or injury
give suck to
maintain (a theory, thoughts, or feelings)
serve as a nurse; care for sick or handicapped people
treat carefully