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
atonement 2643 ** katallage ** {atonement}, reconciliation(-ing).
atonement 3722 -- kaphar -- appease, make (an {atonement}, cleanse, disannul,forgive, be merciful, pacify, pardon, purge (away), put off, (make)reconcile(-liation).
atonement 3725 -- kippur -- {atonement}.