handicapped person vs someone

handicapped person and someone both are nouns.

Word	Noun	Adjective	Verb	Adverb
handicapped person	Yes	No	No	No
someone	Yes	No	No	No

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

handicapped person: a person who has some condition that markedly restricts their ability to function physically or mentally or socially
someone: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of handicapped person include individual, mortal, person, somebody, soul.

handicapped person (noun)	someone (noun)
a person who has some condition that markedly restricts their ability to function physically or mentally or socially	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential