Hey CyanJag.
I mostly use hardcopy books for my lookin' up stuff. At Barns & Noble I found several rhyming dictionaries and thearsus.
I think any book store would have them.
I also have a small freeware rhyming dictionary from AnalogX.
Everything they have is free.
Here's the link to their RD.
I use it quite often. I only wish I could add to the data base.
Do you have any preferred rhyming dictionaries (books)? I look at a computer enough during the day that when I find time to write I would rather turn pages than go to another web site. I am sure the subject of rhyming dictionaries has been cover many times. Sorry I haven't searched.