tip of my tongue...

[L'Impresario]

That's what happens when you don't have two standard letters for hard k's and heavily aspirated h's :p
In Greek you can make the distinction, because it's actually autarkia (αυτάρκεια) and autarhia (αυταρχία).
This also reminds me that English lacks accents for intonational purposes, contributing to the confusion.