Perfect Rhymes (Not Ideal for Formal Use)
* mockin' (more common in the context of "making fun of")
* stockin' (usually refers to stockings, a type of clothing)
* bockin' (not a common word, but rhymes)
Near Rhymes (More Versatile)
* rocking
* shocking
* talking
Rhymes Using Similar Sound Patterns
* locking
* clocking
* knocking
Ultimately, the best rhyme depends on the specific context and your desired effect.