personality vs somebody

personality and somebody both are nouns.

Word	Noun	Adjective	Verb	Adverb
personality	Yes	No	No	No
somebody	Yes	No	No	No

personality (noun)	somebody (noun)
the complex of all the attributes--behavioral, temperamental, emotional and mental--that characterize a unique individual	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential
a person of considerable prominence