Probably the EASIEST thing to do is simply 'ask' when a person says 'Shaman', of which culture they are talking about. That would then simplify understanding whether it was a Shaman using a drum in deepest Siberia, or a Curandero working with plant spirits, in the Amazon.

These are big differences, so the need for clarity is imperative, even if they seek a similar outcome!

As the saying goes, 'knowledge is power': Less 'fluff', MOAR FACTS!