English Theasurus that shows all the ways the English word is translated from the original Greek and Hebrew.
English Theasurus from the Hebrew and Greek Strong's Dictionary
breastplate 2382 ** thorax ** {breast-plate}.
breastplate 2833 -- choshen -- {breastplate}.
breastplate 8302 -- shiryown -- {breastplate}, coat of mail, habergeon, harness.