Per the request of Skipvia and others, you can now tag all words in a list in one fell swoop. Click on the ‘add tags’ link on any list page, on the left below the list name.
This tags every word in the list, not the list itself.
If you want to tag every word in a list except for a few, you can bulk-tag the list, then go in to the individual words and remove the tag where not appropriate. So you can tag 498 of the words in a 500 word list in 3 steps, rather than 498.
This is the heart of Wordie: helping you waste time more efficiently.