Member Ari shared two resources that can help you find that rhyme.

Rhymezone.com allows you to search for the words that rhyme with your chosen word, and provides results grouped by number of syllables. Not only that, it will also search for related words, near rhymes, same consonants, and more.

“Roget’s Thesaurus” is actually a book written in the early 19th century by Peter Mark Roget. If you are stuck on a difficult rhyme, using a synonym may help. This book is available as a free download from numerous sources, such as Project Gutenberg.