Coil

Coil starts each day with one seed word, such as GUITAR, shown above an empty row. Your first word has to share at least one letter with the seed; your second must share at least two letters with your first; the third at least three with the second, and so on. Repeated letters only count once, each word can only be played once per game, and the keyboard highlights the letters of the previous word so you can see what to reuse.

Turns are timed once you type your first letter, so the chain is a race against the clock as well as the dictionary. Longer words score more and make the next turn easier, because they leave spare letters to share. Your score is base points multiplied by a bank that grows as you play, with bonuses for playing a word that reuses every letter of the previous one and for reaching many distinct letters across the chain. Powerups such as Rewind, Freeze, Hint and Wildcard are earned through play and streaks.

The daily board ranks players by chain length with score as the tie-break, and there are all-time boards for longest chain and highest score. A Free Play mode is endless for practice. You can play without an account; a free one syncs your name, streak and chains across devices.