Strong’s Greek
G2447 — ios
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἰός
ios — pronounced ee-os'
perhaps from eimi (to go) or hiemi (to send); rust (as if emitted by metals); also venom (as emitted by serpents):--poison, rust.
3 occurrences in the KJV.
Romans 3:13
Their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips:
James 3:8
But the tongue can no man tame; it is an unruly evil, full of deadly poison.
James 5:3
Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days.