So she gains her powers when she says 'enchantress'? 
Um, see, that's almost a weakness in and of itself. Not that it comes up that often in normal conversation, I guess, but it's an adjective. Not to mention, you know, not being able to tell people her super-identity without powering/de-powering herself....

It doesn't work like that, same as Captain Marvel, merely saying the word won't trigger the transformation. its a vocal spell activated by saying the word with a distinct tone and clarity.

Well you wouldn't have to say it in conversation, nor would she probably say it in front of people. 

She's said her name plenty of times and was never depowered, she has to want to empower/depower herself. But I've never known Amora to want to depower herself.