Forum:Snare vs Root: Final

Let's settle this, once and for all: What is the difference between a snare and a root, and which one(s) do we use? I believe this is important, because there is a good deal of ambiguity on League forums (when I looked it up) and with players (the friend I tested things with told me to just look at the wiki). Some users believe that we should only use root, but I believe this is incorrect, based on my interpretation of root being very limited in actual use.

The question is: what keywords do we use to describe non-stun immobilization crowd control?

The main two seem to be "snare" and "root", with flavor words used in ability descriptions like "bind", "immobilize", and "entangle" (maybe more). The definitions I propose are:
 * Snare: Crowd control that fixes a champion in place, while still allowing autoattacks and ability casting.
 * Root: Crowd control that fixes a champion in place, interrupting channels, preventing autoattacks, but abilities can still be cast.

Additionally, in ability descriptions, do we use/eliminate verbatim copy-paste of ability descriptions? Should we replace ambiguous terminology like immobilize with the actual term, or should this technical detail only be located in additional info?