blond person vs somebody

blond person and somebody both are nouns.

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

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

blond person: a person with fair skin and hair
somebody: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

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

blond person (noun)	somebody (noun)
a person with fair skin and hair	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential