harbor vs entertain

harbor is a noun but entertain is not a noun.

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

As verbs, harbor and entertain are synonyms defined as:

Other synonyms of harbor include bear, harbour, hold, nurse.

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

harbor (verb)	entertain (verb)
maintain (a theory, thoughts, or feelings)	take into consideration, have in view
hold back a thought or feeling about	maintain (a theory, thoughts, or feelings)
keep in one's possession; of animals	provide entertainment for
secretly shelter (as of fugitives or criminals)