Great stuff. Looks like it's turning out to be a good resource for those struggling to map out and make sense of all the design jargon.
You're right about the redundancy though, as there's a lot of crossover between the different terms. Design Thinking happens to be one of the most butchered. But for what it's worth, I remember this quote from Richard Buchannan which he made in 2001 in a paper titled "Design Research and the New Learning":
"Frankly, one of the greatest strengths of design is that we have not settled on a single definition. Fields in which definition is now a settled matter tend to be lethargic, dying, or dead fields, where inquiry no longer provides challenges to what is accepted as truth."