Inside the Voynich Network: graph analysis

[Rafal]

It would be good to try to join the declined words (or plurals). I must think how to do it

I believe you won't do it in an easy way.

There may be several patterns of declension in a language and a lot of exceptions so writing some general rules rather wouldn't work. You would basically need for each language a database of words linking forms of the same word.

I don't know if such things exist.