Perfect Rhymes:
* trap
* scrap
* nap
* snap
* flap
* chap
* map
* gap
* lap
Near Rhymes:
* clapboard
* back up
* wrap up
* step up
* pack up
* crack up
You can also use slant rhymes, where the words have similar sounds but aren't perfect rhymes. Some examples include:
* handicap
* sandcast
The best rhyming word for you will depend on the context of your sentence or poem.