There are lots of online and print rhyming dictionaries available. A while back, Janis, who runs a site with a rhyming dictionary and other creative writing tools for poets called rhymedesk.com, offered me the code for a widget to add a rhyming dictionary to my website.
I also added it to our own poet links page.
Give it a try.
Enter a word in the search box above.Provided by Rhyme Desk