Perfect Rhymes:
* bog
* flog (to beat severely)
* frog
* jog
* log
* prog (to progress)
* shog (a Scottish word for "to shake" or "to move quickly")
Near Rhymes (slant rhymes):
* vogue
* rogue
* smog
You can also play with homophones:
* whole
Ultimately, the best rhyme depends on the context of your poem or phrase.