Yeniseian is a term that refers to a group of indigenous languages spoken in parts of Siberia. Synonyms for this word are hard to come by, as it is a specific term that describes a particular group of languages. However, some possible synonyms that can be used in certain contexts include Siberian dialects, indigenous Siberian languages, or even simply Siberian languages. These terms can be used interchangeably with yeniseian in some cases, but they may not be appropriate in all situations, depending on the level of specificity required. Overall, yeniseian is a unique term that describes an interesting and important aspect of Siberian culture and linguistics.