Afro-wig vs false hair

Afro-wig and false hair both are nouns.

Word	Noun	Adjective	Verb	Adverb
Afro-wig	Yes	No	No	No
false hair	Yes	No	No	No

As nouns, false hair is a hypernym of Afro-wig; that is, false hair is a word with a broader meaning than Afro-wig:

Afro-wig: a wig that gives the appearance of an Afro hairdo
false hair: a covering or bunch of human or artificial hair used for disguise or adornment

Other hypernyms of Afro-wig include hairpiece, postiche.

Afro-wig (noun)	false hair (noun)
a wig that gives the appearance of an Afro hairdo	a covering or bunch of human or artificial hair used for disguise or adornment