When trying to communicate an idea or describe something, we often rely on imagery to paint a picture in the minds of our listeners or readers. Here are some potential synonyms for the phrase "forms mental picture of": 1. Envisions - this verb suggests a more active role in creating an image in one's mind. 2. Imagines - similar to "envision," this word implies that the mental picture is entirely subjective and based on one's own creativity. 3. Visualizes - this verb suggests a more deliberate and intentional effort to conjure an image in the mind. 4. Conceives - this verb implies that the mental picture has been thoughtfully crafted or constructed. 5. Fancifulizes - this playful verb suggests creating a mental picture that may not be entirely realistic but is full of imaginative flair.