deaf person vs somebody

deaf person and somebody both are nouns.

Word	Noun	Adjective	Verb	Adverb
deaf person	Yes	No	No	No
somebody	Yes	No	No	No

As nouns, somebody is a hypernym of deaf person; that is, somebody is a word with a broader meaning than deaf person:

deaf person: a person with a severe auditory impairment
somebody: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of deaf person include individual, mortal, person, someone, soul.

deaf person (noun)	somebody (noun)
a person with a severe auditory impairment	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential