sanctuary vs harbor

sanctuary and harbor both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanctuary	Yes	No	No	No
harbor	Yes	No	Yes	No

As nouns, harbor is a hyponym of sanctuary; that is, harbor is a word with a more specific, narrower meaning than sanctuary:

Other hyponyms of sanctuary include harbour, safehold, safe house.

sanctuary (noun)	harbor (noun)
area around the altar of a church for the clergy and choir; often enclosed by a lattice or railing	a place of refuge and comfort and security
a shelter from danger or hardship	a sheltered port where ships can take on or discharge cargo
a consecrated place where sacred objects are kept

sanctuary (verb)	harbor (verb)
	maintain (a theory, thoughts, or feelings)
	hold back a thought or feeling about
	keep in one's possession; of animals
	secretly shelter (as of fugitives or criminals)