circumcision vs Brith

circumcision and Brith both are nouns.

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

As nouns, Brith is a hyponym of circumcision; that is, Brith 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
Brith: the Jewish rite of circumcision performed on a male child on the eighth day of his life

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

circumcision (noun)	Brith (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