Perfect Rhymes:
* buckles
* chuckles
* huckles (a type of blueberry)
* muckles (an archaic word meaning "to make a low, muffled sound")
Near Rhymes (slant rhymes):
* bottles
* noodles
* wattles (a fleshy wattle under the chin of some birds)
* dangles
Bonus:
* punckles (a made-up word that sounds like "knuckles" but doesn't actually exist)
The best rhyme for you will depend on the context of what you're writing.