I just re-read Koen's post and he didn't get them confused.
He explained what a synthetic language was and then he explained what "synthetic abjad" would mean (if you have a script that combines the two characteristics).
I was doing the same thing. I was saying that Voynichese has some properties of synthetic languages, and it has some properties of an abjad. Yes, one is how the words are constructed and the other is how it is written. There's no reason they can't both be characteristics of an invented script. I think the STRUCTURE of Voynichese is similar to what you might get if you created a synthetic abjad (a synthetic language that could be written without vowels).
He explained what a synthetic language was and then he explained what "synthetic abjad" would mean (if you have a script that combines the two characteristics).
I was doing the same thing. I was saying that Voynichese has some properties of synthetic languages, and it has some properties of an abjad. Yes, one is how the words are constructed and the other is how it is written. There's no reason they can't both be characteristics of an invented script. I think the STRUCTURE of Voynichese is similar to what you might get if you created a synthetic abjad (a synthetic language that could be written without vowels).