What is a rhyming word for tree like free?

There isn't a perfect rhyme for "tree" in the same way that "free" rhymes with "bee". However, here are some options that you could use depending on the context:

Near rhymes:

* See

* Glee

* Three

Eye rhymes (words that look like they rhyme, but don't sound exactly alike):

* agree

* degree

It really depends on what you're trying to achieve with your rhyme!