CrossWord Rush is a free online word puzzle game that brings a crossword-like challenge to the activity of joining letters to form words. Players can choose a themed dictionary and start playing, making it easy to explore topics they already enjoy while testing their vocabulary and knowledge. The available Korean-language collections cover a wide range of interests, including Pokémon names, moves and items; anime and manga; films; games such as League of Legends, Minecraft and Valorant; sports players; idols; webtoons; and historical or literary subjects.

The site also offers an English Pokémon dictionary and a dinosaur-themed collection. Each dictionary provides its own set of words, with the site displaying word counts and play totals to help visitors browse popular options. CrossWord Rush is designed for quick access to themed puzzles rather than a single fixed word list, so players can switch subjects to suit their interests.

The site provides game introductions, help, terms, privacy information and a contact option, and also announces an added initial-consonant quiz