wight vs someone

wight and someone both are nouns.

Word	Noun	Adjective	Verb	Adverb
wight	Yes	No	No	No
someone	Yes	No	No	No

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

wight: a living being
someone: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

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

wight (noun)	someone (noun)
a living being	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential