harbour vs conceal

harbour is a noun but conceal is not a noun.

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

As verbs, conceal is a hypernym of harbour; that is, conceal is a word with a broader meaning than harbour:

Other hypernyms of harbour include hide.

harbour (noun)	conceal (noun)
a place of refuge and comfort and security
a sheltered port where ships can take on or discharge cargo

harbour (verb)	conceal (verb)
maintain (a theory, thoughts, or feelings)	hold back; keep from being perceived by others
hold back a thought or feeling about	prevent from being seen or discovered
keep in one's possession; of animals
secretly shelter (as of fugitives or criminals)