Moanfully is an adverb that describes an expression of discontent, complaint, or unhappiness. There are several other words that can be used in place of moanfully, including mournfully, lamentably, plaintively, and sorrowfully. Mournfully refers to a state of sadness or grief, while lamentably is used to express regret or disappointment. Plaintively describes a sound that is mournful or melancholy, while sorrowfully refers to a feeling of sadness or disappointment. All of these words are appropriate in different contexts and can help to add nuance and depth to your writing, depending on the emotion you are trying to convey.