haven vs harbour

haven and harbour both are nouns.

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

As nouns, haven and harbour are synonyms defined as:

haven and harbour: a sheltered port where ships can take on or discharge cargo

Other synonyms of haven include harbor, seaport.

haven (noun)	harbour (noun)
a shelter serving as a place of safety or sanctuary	a place of refuge and comfort and security
a sheltered port where ships can take on or discharge cargo	a sheltered port where ships can take on or discharge cargo

haven (verb)	harbour (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)