Cavalry vs. Calvary

What’s the difference between cavalry and calvary? The first of these two refers to the group of soldiers on horseback, and is a linguistic relative of such “horsey” words as caballero, the Spanish horse-riding gentleman, and cavalcade, originally a “parade of horses.” The word calvary, on the other hand, derives from the Latin calvaria, “skull,” and refers to the hill where Jesus was crucified, known in Aramaic as Golgotha, or “place of the skull.” This is part of a complete episode.