Rime riche is when two or more words end in the same sound. It's like when you say "cat" and "bat" and they both end with the "at" sound. Rime riche is when words have the same ending sound like that. It's kind of like rhyming, but it's even more special because it's not just the sound in the middle of the word that's the same, it's the very last sound. It's like they're best friends and they like to finish their words the same way! So next time you hear words that sound the same at the end, you can say "wow that's a rime riche!"