Nightly is a word commonly used to describe something that occurs or happens every night. However, this word can become repetitive if used often. Fortunately, there are a variety of synonyms that can be used as an alternative to nightly. Some of these synonyms include nocturnal, evening, nightly, after dark, dusk, and twilight. Depending on the context of a sentence, any of these words can be used effectively to replace nightly. These synonyms can add variety to writing and help to add more depth to descriptions of events that occur during the night.