When it comes to academic writing, a thesis is a crucial element that sets the tone for the entire paper. However, there are times when you need to vary your language or use synonyms for the word 'most thesis' to enhance the readability of your work. Here are some options to consider: central argument, main assertion, key message, primary claim, critical point, main point, primary concept, critical theme, fundamental idea, core hypothesis. By using these synonyms for 'most thesis', you can add variety to your writing and still achieve the desired impact and emphasis on your key message.