How about this: "suitcase word" means one word, different concepts to different people. Which seems aligned with your definition. "Essentially contested concept", on the other hand, I can't think of an example of two people contesting the same concept. I'm sure examples exist, I'm just drawing a blank.
My own experience is that all the words I listed are surprisingly problematic in conversations / debates. An example of difficulty. Take the question, "can a machine be conscious"? You would expect that the tedious arguing could be shut down with the statement "maybe that's like asking whether a submarine can swim." But there is endless debate on the subject. Consciousness is a suitcase word. And it seems, an "essentially contested concept", or is it? The utility of the term is still unclear to me. Id love to hear examples, I'm probably not seeing the full picture.
My own experience is that all the words I listed are surprisingly problematic in conversations / debates. An example of difficulty. Take the question, "can a machine be conscious"? You would expect that the tedious arguing could be shut down with the statement "maybe that's like asking whether a submarine can swim." But there is endless debate on the subject. Consciousness is a suitcase word. And it seems, an "essentially contested concept", or is it? The utility of the term is still unclear to me. Id love to hear examples, I'm probably not seeing the full picture.