hearing vs fair hearing

hearing and fair hearing both are nouns.

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

As nouns, fair hearing is a hyponym of hearing; that is, fair hearing is a word with a more specific, narrower meaning than hearing:

hearing: (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
fair hearing: a hearing that is granted in extraordinary situations where the normal judicial process would be inadequate to secure due process because the person would be harmed or denied their rights before a judicial remedy became available (as in deportation or loss of welfare benefits)

Other hyponyms of hearing include administrative hearing, competence hearing, quo warranto.

hearing (noun)	fair hearing (noun)
the act of hearing attentively	a hearing that is granted in extraordinary situations where the normal judicial process would be inadequate to secure due process because the person would be harmed or denied their rights before a judicial remedy became available (as in deportation or loss of welfare benefits)
(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

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