Perfect rhymes:
* sighting
* lighting
* fighting
* blighting
* exciting
* inviting
Near rhymes (slant rhymes):
* brightening
* heightening
* slighting
* relenting
Eye rhymes:
* frightening
* benighting
You can also use words that rhyme with "poem" itself, like home, roam, gnome, dome, and combine them with words that rhyme with "writing".
For example:
* Roaming and writing
* Homely writing
* Dome-like writing
Ultimately, the best rhyming word will depend on the context and the specific tone you want to convey in your poem.