What is a homograph for project and sentence?

You really need to ask one question at a time. This website is designed to provide one answer for one question. However, I will answer this once.

Project with the emphasis on "pro" means something that you do, as a science project. Project with the emphasis on "ject" means to thrust outwards, as in projecting your voice.

Sentence is pronounced the same both ways, but can mean a string of Words like this one, or a term in prison.