"Normal multiplet" is a term used in spectroscopy to describe a pattern of spectral lines. However, there are several other synonyms that can be used to describe this phenomenon. One such synonym is "regular multiplet," which also conveys the same meaning. Another term that can be used is "standard multiplet," which again highlights the idea of a commonly observed pattern. Additionally, "typical multiplet" and "conventional multiplet" are also acceptable synonyms. These words all emphasize the consistent and regular nature of the spectral lines observed in a normal multiplet.