refuge vs shelter

refuge and shelter both are nouns.

Word	Noun	Adjective	Verb	Adverb
refuge	Yes	No	No	No
shelter	Yes	No	Yes	No

As nouns, shelter is a hypernym of refuge; that is, shelter is a word with a broader meaning than refuge:

refuge (noun)	shelter (noun)
act of turning to for assistance	a structure that provides privacy and protection from danger
a shelter from danger or hardship	protective covering that provides protection from the weather
something or someone turned to for assistance or security	temporary housing for homeless or displaced persons
a safe place	a way of organizing business to reduce the taxes it must pay on current earnings
	the condition of being protected

refuge (verb)	shelter (verb)
	invest (money) so that it is not taxable
	provide shelter for