The difference between All-encompassing and Overall

When used as adjectives, all-encompassing means including everything, whereas overall means all-encompassing, all around.

Overall is also noun with the meaning: a garment worn over other clothing to protect it.

Overall is also adverb with the meaning: generally.

check bellow for the other definitions of All-encompassing and Overall

Overall as an adverb:

Generally; with everything considered.

Examples:

"'Overall, there is not enough evidence to form a clear conclusion."

Overall as a noun (British):

A garment worn over other clothing to protect it; a coverall or boiler suit. A garment, for manual labor or for casual wear, often made of a single piece of fabric, with long legs and a bib upper, supported from the shoulders with straps, and having several large pockets and loops for carrying tools.
Overall as a noun (in the plural, US):

A garment, worn for manual labor, with an integral covering extending to the chest, supported by straps.