ReimBuch is a German-language online rhyming dictionary designed to help users quickly find words to complete a verse. Visitors enter a word or its ending and receive matching rhyme suggestions, making the service useful for writing poems, song lyrics, speeches, sayings, and other creative texts. Results can be organized by syllable count, and alternative suggestions can be explored to inspire further ideas. The website also displays recently searched terms.

ReimBuch offers an app for iPhone and iPad that extends these tools with an offline rhyme database. App features include a search history, favorites and bookmarks, a random rhyme generator, and a NotizBuch for saving original rhymes, passages, and song lyrics. Users can also record and replay voice notes, including while playing a track from their music library to help preserve a rhythm. The database is described as regularly expanded, with options to submit suggestions by in-app email and manually load updates. ReimBuch is a practical resource for writers and other creative users seeking inspiration or a suitable rhyme.