pix chest vs pyx chest

pix chest and pyx chest both are nouns.

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

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

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

Other synonyms of pix chest include pix, pyx.

pix chest (noun)	pyx chest (noun)
a chest in which coins from the mint are held to await assay	a chest in which coins from the mint are held to await assay