I apologize if this is a duplicate request. I searched and I know I have seen this enhancement request before but it did not come up.(I recall someone named Sophie Freud made it or commented on it last year and there was some discussion around it.)

It would be a tremendous help if new words were added to a global autocomplete list rather than added only to per-document lists.

I just finished writing a book (Democratic Party Renaissance - Rank and File Action Manifesto) and at some point will probably do a 2nd ed and perhaps a follow up volume that addresses some of the topics in depth.

In producing the text I typed hundreds of "new" words (people, places, parties, laws, etc.) and if I do the 2nd ed or a follow up volume I would obviously like those words in my autocomplete list.

I have worked at a professional level as an experimental psychologist, a computer scientist, and other fields in which there are hundreds if not thousands of lexical items one uses every day. Not to be able to, for example, write a second paper on the same topic as 6 months ago and use the same autocomplete list is, to put it mildly, frustrating as all get out.

There is a hack: Make and prepopulate a word list document with just all your words, open it whenever you're writing a new document, create the new document, save the new document and the word list document frequently, and it kind of works ok. But that's a pretty circuitous route to achieve what I am sure many many people working in lexically rich disciplines would love to have and when I describe the hack to people who would like to have global autocomplete their eyes start to roll back after the first sentence. 

At the UX level, perhaps along with the "collect words" and "discard when closing document" check boxes in the Tools/Autocorrect/Autocorrect Options panel, add a "add words to global autocomplete list" checkbox.

Then, in options/settings, a choice to "always load global autocomplete list" or just do it by default and, ideally, put a button on the toolbar "Turn On/Off Global Autocomplete" scoped to the current document.

By the way I have 8K words in my prepopulated document and have no performance issues on an old single core 4GB W7 machine so I don't see why the limit couldn't be bumped up to 20K.

I really like autocomplete, have used e.g., LightKey which is a really nice piece of commercial software, and apparently W10 has some global autocomplete functionality. 

But to provide a robust global autocomplete with an open source product as good as LibreOffice would really advance the cause.

Thanks.