Analgesia

[William Hupy]

From Greek, meaning "not to feel pain."

[Perry Lassiter]

Is anagesia synonymous with pain reliever, anesthetic, and other similar terms or are their differing shades of meaning or usage?

[Slava]

Not well edited, but here's a write up on the difference between analgesia and anesthesia: Difference Between site.

I've bookmarked this one for future reference.