Be mindful of fairness in words describing men versus women.
I looked up the phrase "wise old woman" and got no word list but only some web pages, including one describing crones. So I looked for synonyms for that, and they were all very negative, e.g. shrew, although crone is used by modern women to mean wise woman. I then looked up "wise old man" and got a lengthy list of wonderful synonyms--savant, philosopher, mastermind, etc. Women can be those things too, you know.