In the past I have been able to run morph searches with a string @N, @V, @R, @A, and so on... choosing all parts of speech for a verse or range. The search would return all of the morphologically tagged text in the verse or range. This would give me something os a word or vocabulary list.
I notice now that the search will only return results if the particular part(s) of speech selected are in the verse or range. So if I search for all parts of speech but there are no adverbs, I get zero results for everything.