(I've been using "short story" and "novella" interchangeably and I've never even heard of a "novelette" before!) -Marianna
Someone messaged me, asking what a "novelette" was. I answered them in messages, but felt there might be more of you out there that do not know what label certain word counts come with.
Because of verbose authors like Stephen King, some people confuse novelettes and novellas with short stories. The designation doesn't mean much to the average reader, but some people can feel cheated upon reading a short story that is only a few thousand words in length, when, in fact, it's exactly what was promised.
This was taken directly from Wikipedia, and is the industry standard. The only thing missing from this list is Flash Fiction, which is anything under a thousand words.