baby vs pappoose

baby and pappoose both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby	Yes	No	Yes	No
pappoose	Yes	No	No	No

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

baby: a very young child (birth to 1 year) who has not yet begun to walk or talk
pappoose: an American Indian infant

baby (noun)	pappoose (noun)
a project of personal concern to someone	an American Indian infant
a very young mammal
a very young child (birth to 1 year) who has not yet begun to walk or talk
the youngest member of a group (not necessarily young)
an immature childish person
an unborn child; a human fetus
a beloved person; used as terms of endearment

baby (verb)	pappoose (verb)
treat with excessive indulgence