Dumpishness is a state of feeling down or melancholic, and there are several words that can be used to describe it. One alternative to dumpishness is despondency, which is a deep sense of sadness or loss of hope. Another synonym for dumpishness is ennui, which refers to a feeling of listlessness or boredom. Similarly, melancholy is a state of being characterized by a feeling of sadness or gloominess, and can be used as a synonym for dumpishness. Other words that can be used include dejectedness, forlornness, and desolation, all of which convey a sense of sadness, loneliness, or hopelessness. Ultimately, the choice of synonym will depend on the specific context and feeling being described.