When it comes to describing the act of getting a sneak peek at something before it's released or shown to the general public, there are several synonyms for the word "previewed" that you can use. Some other words that could be used include "previews", "previewing", or "previewings". Additionally, you could use words like "teasers", which suggests something that's being shown to drum up interest, or "sneak peeks", which similarly denotes something that's being examined before it's officially unveiled. Other useful words could be "preliminary viewings", "advance screenings", or "early showings", depending on the context and formality of what you're trying to describe.