If you are an Android phone person here is a rhyming dictionary just for your needs.
Having a rhyming dictionary in your phone is a great idea that should make your life much easier and your songs much better.
RhymeNow is the only true English-language rhyming dictionary for Android.

With RhymeNow you can:

* Quickly find rhymes from a database of 55,000 English words
* Look up words that begin with, end with, or contain a group of letters
* Find words that sound alike

No internet connection required.
$1.99 app