CATT, your difinations differ from mine, but I agree that most bass fisherman spend too much time tied to the shoreline a casting distance way.
Hump to me; underwater island, depending on the lake level. Humps become islands as the water pool lowers, regardless of ther size.
Not all lakes have humps, some natural lakes are often feature less out in the basin, due to siltation filling in the bottom.
Ridge to me is similar to ridges above the water, they just extend down under water; the crest of a point for example or a ridge line on any mountain or hill. I consider outside river bends that have erroded to be ledges.
There isn't any standard terminolgy, it's very regional.
Out west where I fish for example, the soil on both humps and ridges is mostly clay and rock, therefor little or no aquatic vegetaion grows on them. Isolated structure elements like rock piles, boulders, trees and brush are the primary targets located on or near the hump or ridges that tend to hold the bass. For that reason we tend to use jigs, drop shot. deep cranks and vertical structure spoons on the outside structure featrues. Carolina rigs used more on the flats where soil can support vegetation, near deeper breaks.
WRB