In response to blackcat
I understand your concern about the ready availability of such words through AI and the like. To me, the art of crossword compiling is not about using obscure words, but more about subtle wordplays, misleading surface reads, touches of wry humour, etc. I used to get really annoyed with Azed for his excessive use of Scottish dialect words, even though I have a native Scot to consult. My own list of all time favourite clues contains only very familiar words.