circumcision vs Bris

circumcision and Bris both are nouns.

Word	Noun	Adjective	Verb	Adverb
circumcision	Yes	No	No	No
Bris	Yes	No	No	No

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

circumcision: the act of circumcising performed on males eight days after birth as a Jewish and Muslim religious rite
Bris: the Jewish rite of circumcision performed on a male child on the eighth day of his life

Other hyponyms of circumcision include Berit, Berith, Briss, Brith.

circumcision (noun)	Bris (noun)
the act of circumcising; surgical removal of the foreskin of males	the Jewish rite of circumcision performed on a male child on the eighth day of his life
the act of circumcising performed on males eight days after birth as a Jewish and Muslim religious rite