This is extremely helpful, but the taxonomy is not complete. I believe it should also include the following, which can be slotted in existing branches:
- thingamabob
- thingamajig
- junk
- junk ‘n stuff
- scraps
- detritus
And of course, another whole branch:
- Thing (Adams Family)
- The Thing (Marvel)
- The Thing (SF blob)
- Thing 1
- Thing 2

I’m sure I’m missing more… you know where the comments are. (Look down.)
Alltop thinks the word “classification” is a little more accurate than taxonomy too.

