The phrase "most chimeral" refers to something that is highly unrealistic or fanciful. Synonyms for this phrase include "most whimsical," "most fantastic," "most imaginary," "most ethereal," and "most unreal." These words all imply a sense of otherworldliness or a departure from reality. Other possible synonyms include "most illusory," "most surreal," "most dreamlike," and "most phantasmagorical." Whether used to describe a work of art, a piece of literature, or a person's imagination, these words convey a sense of wonder and mystery, inviting the reader to explore the limits of their own creativity and imagination.