Downcastnesses is a word that refers to a state of feeling low or depressed. There are numerous synonyms that can be used to replace this word, which can help to diversify the language utilized when discussing emotional states. For instance, despondency or melancholy are two common words that could be used instead of downcastnesses. Other synonyms that could be used in place of this word include gloom, sadness, despair, and dejection. It's worth noting that the emotions associated with downcastnesses can be complex and multifaceted, which means that there are many different words and phrases that might be appropriate to describe these feelings.