Perfect rhymes:
* bray (the sound a donkey makes)
* slay (to kill)
* way (a path or direction)
* say (to speak)
* day (a period of 24 hours)
* hay (dried grass for animal feed)
* lay (to put something down)
* pay (to give money for goods or services)
* stay (to remain in a place)
* way (a method or manner)
Near rhymes:
* grey (a shade of color)
* prey (an animal hunted by another)
* play (to engage in an activity for enjoyment)
* spray (to scatter liquid droplets)
* stray (to wander away)
The best rhyme for "cray" will depend on the context of your sentence.