Lemmas are an essential element of any academic paper or research. They are statements or assertions that are considered to be true and established facts. When writing an academic paper, it's important to use variety in language to make your writing more engaging and to avoid repetition. Synonyms for the word "lemmas" include axioms, propositions, postulates, theorems, hypotheses, and assumptions. These words can be interchanged in a sentence without changing the meaning and add a new dimension to your writing. Using different synonyms for lemmas is a great way to enhance your writing and make it more professional.