What is a homophone for since?

There isn't a perfect homophone for "since" in the sense of a word that sounds exactly the same but has a different meaning.

However, depending on the context, these words can be used in a similar way and sound similar:

* sense: This word can sometimes be used in place of "since" to mean "because," but it doesn't sound exactly the same. For example, "I've been feeling tired sense I didn't get enough sleep" could be replaced with "I've been feeling tired since I didn't get enough sleep."

* sins: This word is a homophone for "since" in the sense that it sounds the same, but it means "wrongdoings." It would be used in a very different context.

Let me know if you'd like to explore the context in which you want to use "since" and I can help you find a suitable alternative.