Are "wifi-tethering" and "wifi-hotspot" redundant?
Are there other forms of tethering or hotspots available for Android?
I would argue that these are all distinct things.
I agree and disagree with Bryan's answer that "wifi-tether" can be dealt with by using separate tags [wifi] and [tether] which will work in a tag search but I disagree becuase it wouldn't work as a click tag (which is how I usually use them, clicking on a tag to get a list of the relevant posts). I think that since wifi-tether is a distinctly different thing than usb-tether and bluetooth-tether that it deserves it's own tag.
Also, wifi-hotspot is a distinctly different thing than tethering. All wifi-hotspots allow wifi-tether(ing) but not all wifi-tether(ing) constitutes a wifi-hotspot. Running your phone as a wifi-hotspot is a specific function that turns it into a wireless router allowing you to connect several devices through it.
I think there should be separate tags for:
Well, you can tether via USB or bluetooth. But with separate [wifi] (or [usb] or [bluetooth]) and [tether] tags, that should get the point across