rehearing vs hearing

rehearing and hearing both are nouns.

Word	Noun	Adjective	Verb	Adverb
rehearing	Yes	No	No	No
hearing	Yes	Yes	No	No

As nouns, hearing is a hypernym of rehearing; that is, hearing is a word with a broader meaning than rehearing:

Other hypernyms of rehearing include listening.

rehearing (noun)	hearing (noun)
the act of hearing again	the act of hearing attentively
	(law) a proceeding (usually by a court) where evidence is taken for the purpose of determining an issue of fact and reaching a decision based on that evidence
	the ability to hear; the auditory faculty
	a session (of a committee or grand jury) in which witnesses are called and testimony is taken
	the range within which a voice can be heard
	an opportunity to state your case and be heard

rehearing (adjective)	hearing (adjective)
	able to perceive sound