Start at Rhymezone (see Resources below) for a quick and easy rhyming dictionary. Simply input the word you need to rhyme and out pops a bunch of choices to get you back into the writing groove. While here be sure to use the option to search for words in Shakespeare’s poems to give your work that classic touch.
Go to the Web site Writeexpress (see Resources below) for more options online. Choose from end rhymes, double rhymes and so on to focus your results. If you like what you see, you can download the whole rhyming dictionary for a reasonable fee.
Go old school and get a real book. Nothing is better than flipping through a hard copy rhyming dictionary to get you started on a poem or to solve a tricky rhyming issue. There are plenty to choose from, including "Webster’s Pocket Rhyming Dictionary" and "Essential Songwriter's Rhyming Dictionary," both available at any bookstore or through Amazon.
Go totally technical with the Master Writer software program. Widely used by songwriters, this software package includes a rhymed phrases dictionary and offers a “pop culture” reference guide to keep you up to date. You can get a free-trial version at their Web site (see Resources below). The price for the complete version is $289.
Rhyme.poetry is a Web site geared specifically for poetry writers and offers not only a nice rhyming dictionary, but plenty of other reference materials for poets as well(see Resources below). This is a good place to break your writer's block and maybe even enter a poetry contest.