Nonperson and Someone

Nonperson noun - A person regarded as nonexistent and having no rights; a person whose existence is systematically ignored (especially for ideological or political reasons).

Someone and nonperson are semantically related. In some cases you can use "Someone" instead a noun "Nonperson".

Someone noun - A human being.

Nonperson and someone are semantically related. Sometimes you can replace term "Nonperson" with "Someone", this nouns are similar.