doll vs kachina

doll and kachina both are nouns.

Word	Noun	Adjective	Verb	Adverb
doll	Yes	No	No	No
kachina	Yes	No	No	No

As nouns, kachina is a hyponym of doll; that is, kachina is a word with a more specific, narrower meaning than doll:

doll: a small replica of a person; used as a toy
kachina: a carved doll wearing the costume of a particular Pueblo spirit; usually presented to a child as a gift

Other hyponyms of doll include golliwog, golliwogg, paper doll, puppet, rag doll, sawdust doll, toy soldier.

doll (noun)	kachina (noun)
a small replica of a person; used as a toy	a carved doll wearing the costume of a particular Pueblo spirit; usually presented to a child as a gift
informal terms for a (young) woman	a deified spirit of the Pueblo people
	a masked dancer during a Pueblo religious ceremony who is thought to embody some particular spirit