What I’m unsure about is what you mean when you say “everything”. I doubt that you actually mean everything, because you’d never get anything done if you had to tab through the dictionary, the phone book, and the vocabularies of every foreign language in order to find what you actually wanted.
The short answer is that you can make
autocomplete-plus list anything, but you have to be able to clearly define what those things are, and either write out a list or have a script that can write out a list. The only constraints are the user’s computer’s memory and your ability to tell the program precisely what you want to see.
If you can tell me what “everything” means, I can help you look for a package that provides it (my initial skim for “node autocomplete” didn’t return anything useful, however) or figure out how to build one (there are instructions on the