Near rhymes:
* Metera (a meter, but not a common word)
* Veterinaria (a type of medicine, also not very common)
* Latter (used to refer to something that comes after something else)
Eye rhymes:
* Specter (a ghost or apparition)
* Letter (a written message)
* Better (superior)
Slant rhymes:
* Theater (a place for performances)
* Sister (a female sibling)
* Faster (moving quickly)
Ultimately, the best rhyming word will depend on the context of your poem or song.