According to the search results, it is not recommended to use eyeliner as lip liner. Eyeliner is made specifically for the eyes, and using non-eye makeup products near the eyeballs can be harmful. The ingredients in lip liner and eyeliner are similar, but they differ in the pigments used to create various shades. Lip liners typically come in standard red, nude, and pink shades, making it difficult to experiment with bold lips. However, it is possible to use a lip liner pencil as an eyeliner pencil, but the answer depends on individual preference and comfort level. If you decide to use eyeliner as lip liner, it is important to keep in mind that eyeliner is very drying, so it is recommended to apply a moisturizer product before applying eyeliner to your lips. Additionally, it is important to use a separate pencil for eyes and mouth to avoid transferring bacteria from your mouth to your eyes. In conclusion, while it is possible to use eyeliner as lip liner, it is not recommended due to the potential risks involved.