What is a homonym for main?

There isn't a perfect homonym for "main" in the sense of a word that sounds exactly the same but has a different meaning. However, depending on the context, you might use these words that are close:

* Mane: This word refers to the long hair on a horse's neck. It's pronounced similarly to "main" but spelled differently.

* Maine: This is the name of a state in the US. It's pronounced the same as "main."

If you're looking for a synonym for "main" (meaning primary or most important), then you might consider words like "principal," "primary," "chief," or "major."

Let me know if you have a specific context in mind, and I can help you find the best word!