Saturnine tremor, the term that describes a gloomy or depressive feeling, can be substituted with various synonyms to convey a range of emotions. One possible alternative is "melancholic quiver", which captures the essence of a somber or mournful vibration. Another potential term is "forlorn shake", which suggests a sense of abandonment or desolation. Additionally, the phrase "woeful shudder" offers a blend of sadness and uneasiness. Lastly, "despondent vibration" can be used to describe a downcast or hopeless trembling. Regardless of the synonym chosen, these expressions help paint a vivid picture of the Saturnine tremor and its associated mood.