A thesaurus
Image credit: <a href="https://www.flickr.com/photos/raymaclean/">Ray MacLean</a> [<a href="https://creativecommons.org/licenses/by/2.0/">CC BY 2.0</a>], via <a href="https://www.flickr.com/photos/raymaclean/5790553505">Flickr</a>

If you’re looking for a synonym for the word “thesaurus,” forget about consulting the Merriam-Webster online thesaurus: it says there isn’t one. But of course Thesaurus Day honors Peter Mark Roget, eponym of Roget’s Thesaurus, who was born on this date in 1779. The Roget’s online thesaurus also lists no single-word synonyms for “thesaurus,” though it does suggest “storehouse of words” and “treasury of words.” To celebrate Thesaurus Day, go learn some new words! (You can start with eponym if you don’t already know what it means.)