haven vs shelter

haven and shelter both are nouns.

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

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

haven (noun)	shelter (noun)
a shelter serving as a place of safety or sanctuary	a structure that provides privacy and protection from danger
a sheltered port where ships can take on or discharge cargo	protective covering that provides protection from the weather
	temporary housing for homeless or displaced persons
	a way of organizing business to reduce the taxes it must pay on current earnings
	the condition of being protected

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