Heh. Except for: element, action, slot, task, goal, task command, subject, target, source, destination, object, actor, path, key, memo, manifest, sender, receiver, self, this, thing, data, value, register, ... I think you enumerated them all.

An "entry" at least implies there is a list somewhere (as would "element"). Both "item" and "entity" are more like "thing". I could see adding "object" to the list.