The word "plangencies" refers to the quality of being mournful, plaintive, or mournful in sound. There are several synonyms for the word, including lamentation, moan, and lament. Other synonyms include wail, howl, and whine. All of these words convey a sense of sorrow or grief, often in relation to the loss of a loved one or other significant event. Whether used in poetry, literature, or everyday conversation, these words can help to create a powerful emotional effect and communicate deep feelings of sadness or longing. So, if you're looking to express your emotions with words, you can use these synonyms for "plangencies" to great effect.