Pygmy vs small person

Pygmy and small person both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pygmy	Yes	No	No	No
small person	Yes	No	No	No

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

Pygmy: any member of various peoples having an average height of less than five feet
small person: a person of below average size

Pygmy (noun)	small person (noun)
any member of various peoples having an average height of less than five feet	a person of below average size