Hebrew and Greek Strong's Dictionary with all the definitions plus combined with every place that word is used in the definitions.
Complete index of every word used in both the Hebrew and Greek Strong's Dictionary in English Word order.
Hebrew and Greek Expanded Dictionary
propitiation 2434 - hilasmos {hil-as-mos'}; atonement, i.e. (concretely) an expiator: -- {propitiation}.
propitiation 2435 - hilasterion {hil-as-tay'-ree-on}; neuter of a derivative of 2433; an expiatory (place or thing), i.e. (concretely) an atoning victim, or (specially) the lid of the Ark (in the Temple): -- mercyseat, {propitiation}.