When outlining a project or idea, sometimes a rough outline is all one needs to get started. However, there are many synonyms for the term "rough outline" that can convey slightly different connotations. One option is a "preliminary sketch," which suggests that the outline is more visual and artistic in nature. Another synonym is a "working draft," which implies that the outline is still a work in progress and subject to change. A "basic framework" suggests that the outline is more structured and solid, whereas a "loose plan" implies that the outline is less structured and flexible. Lastly, "initial proposal" implies that the outline is a formal first step towards a larger project or idea.