Expressibility refers to the ability or capacity to convey or communicate a concept, feeling, or idea effectively. A few synonyms for expressibility are eloquence, articulacy, and fluency. Eloquence emphasizes the power of language and the ability to speak or write in a compelling and persuasive manner. Articulacy indicates a high level of clarity and coherence in expressing thoughts or opinions. Fluency, on the other hand, suggests the smoothness and ease with which one can convey ideas or emotions. These synonyms all underline the capability to effectively and convincingly express oneself, which is vital in various domains such as communication, writing, public speaking, and interpersonal relationships.