Strong’s Greek
G4451 — purosis
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
πύρωσις
purosis — pronounced poo'-ro-sis
from 4448; ignition, i.e. (specially), smelting (figuratively, conflagration, calamity as a test):--burning, trial. see GREEK for 4448
2 occurrences in the KJV.
Revelation 18:9
And the kings of the earth, who have committed fornication and lived deliciously with her, shall bewail her, and lament for her, when they shall see the smoke of her burning,
Revelation 18:18
And cried when they saw the smoke of her burning, saying, What city is like unto this great city!