"Helle" is a word that has limited synonyms, as it is a name and not a common noun. However, some possible synonyms could be "bright," "shining," or "radiant," as the name "Helle" is commonly associated with brightness and light. Another possible synonym could be "spirit," as the name can also be interpreted as meaning "soul" or "essence." It is worth noting that, as a proper noun, the name "Helle" cannot be substituted for other words in most contexts, as it refers to a specific person and would create confusion if used inappropriately.