You can add to this the Apple terminology, which is simdgroup. This reinforces your point – vendors have a tendency to invent their own terminology rather than use something standard.
Rule #1 in not getting involved in any patent lawsuit: don't use the same terminology as your competitors.
I have to give it to Apple though in this case. Waves or warps are ridiculously uninformative, while simdgroups at least convey some useful information.