pix chest vs pyx

pix chest and pyx both are nouns.

Word	Noun	Adjective	Verb	Adverb
pix chest	Yes	No	No	No
pyx	Yes	No	No	No

As nouns, pix chest and pyx are synonyms defined as:

pix chest and pyx: a chest in which coins from the mint are held to await assay

Other synonyms of pix chest include pix, pyx chest.

pix chest (noun)	pyx (noun)
a chest in which coins from the mint are held to await assay	any receptacle in which wafers for the Eucharist are kept
	a chest in which coins from the mint are held to await assay