Mendeleev is a proper noun that refers to the Russian chemist, Dmitri Ivanovich Mendeleev, who is known for creating the periodic table in the 19th century. As a proper noun, there are no synonyms for Mendeleev that could replace his name effectively. However, synonyms can be provided for terms that are related to Mendeleev's work, such as periodic table, chemistry, elements, and science. These synonyms can help to broaden the vocabulary and enhance the understanding of the topic. Some synonyms that can replace these terms are atomic chart, chemical science, building blocks, and natural philosophy.