baptistry vs baptistery

baptistry and baptistery both are nouns.

Word	Noun	Adjective	Verb	Adverb
baptistry	Yes	No	No	No
baptistery	Yes	No	No	No

As nouns, baptistry and baptistery are synonyms defined as:

Other synonyms of baptistry include baptismal font, font.

baptistry (noun)	baptistery (noun)
bowl for baptismal water	bowl for baptismal water