rearing vs upbringing

rearing and upbringing both are nouns.

Word	Noun	Adjective	Verb	Adverb
rearing	Yes	Yes	No	No
upbringing	Yes	No	No	No

As nouns, rearing and upbringing are synonyms defined as:

rearing and upbringing: helping someone grow up to be an accepted member of the community

Other synonyms of rearing include breeding, bringing up, fosterage, fostering, nurture, raising.

As nouns, upbringing is a hypernym of rearing; that is, upbringing is a word with a broader meaning than rearing:

rearing: the properties acquired as a consequence of the way you were treated as a child
upbringing: properties acquired during a person's formative years

rearing (noun)	upbringing (noun)
helping someone grow up to be an accepted member of the community	helping someone grow up to be an accepted member of the community
the properties acquired as a consequence of the way you were treated as a child	properties acquired during a person's formative years

rearing (adjective)	upbringing (adjective)
rearing on left hind leg with forelegs elevated and head usually in profile