Start with one word. Change a single letter at a time — every step must be a real word — until you reach the goal. The most thoughtful of the six games, and the most satisfying to finish.
You're shown a starting word and a goal word, both the same length. Tap a letter in your current word and change it. If the result is a real word, it becomes your new current word and you've climbed a rung. Keep going until you reach the goal.
The rules are strict in one way and generous in another. Strict: you may only change one letter per step, and every step must be a real word — no scrambling the letters, no passing through nonsense on the way to something good. Generous: there's no limit on how many steps you take, and no penalty for a step that turns out to be a dead end. Wander as much as you like.
A short ladder looks like this:
Four steps, each one a real word, each one differing from the last by exactly one letter. That's the whole game. It was invented by Lewis Carroll in 1877, which tells you something about how well the idea has held up.
Before touching anything, look at the start and goal side by side and note which positions already match. In COLD → WARM, nothing matches, so you have four letters to change and you'll need at least four steps. In COLD → BOLD you'd need one. Knowing your minimum tells you whether you're facing a quick hop or a proper journey.
Not all positions are equal. The first letter of a four-letter word is usually the easiest to swap, because English has huge families of words that differ only in their opening letter: CAT/BAT/HAT/MAT/RAT/SAT/FAT/PAT/VAT. Vowels in the middle are the hardest, because changing them tends to break the word. So do the cheap changes first and save the awkward one for when you've got the rest in place.
This is the technique that unsticks most hard ladders, and it's worth building the habit. Instead of pushing forward from where you are, ask: what words are one letter away from the goal? Generate three or four of them. Now you have a small set of targets much closer to home, and the problem becomes "reach any of these" rather than "reach that one exact word". Meeting in the middle is far easier than driving all the way.
When you're truly stuck, pick one position and run the alphabet through it out loud. If you're at CARD and stuck, try _ARD: BARD, HARD, LARD, WARD, YARD. Then C_RD: CORD, CURD. Then CA_D. It's mechanical, it takes twenty seconds, and it turns up options you'd never have thought of by staring. Most people give up before doing this, which is exactly why it works.
There's no penalty for going the wrong way, so explore. Take the step that looks vaguely promising and see what it opens up. Some of the best routes only become visible once you're standing somewhere you didn't plan to be, and you can always change the letter back.
Nearly every English word needs a vowel in a sensible place, so vowel positions are where ladders get stuck. If you can't move, check whether you've painted yourself into a corner with an unusual vowel. Getting back to a common vowel — an A, an E, an O — usually opens up several routes at once.
The hint button will show you a valid next step when the route has genuinely dried up. Hints cost coins, and coins carry across every Calm Game, so play elsewhere on the site funds your hints here.
Word ladders are the one game of the six where a hint can rescue an otherwise ruined session — one nudge and the whole remaining path often becomes obvious. There's no shame in it.
A word ladder is a search problem wearing a word game's clothes. You're holding a goal in mind, generating candidate moves, evaluating them against a constraint, and backtracking when a branch fails. That's a genuinely demanding piece of thinking, and it's the same shape of thinking that route-planning and problem-solving take outside of games.
What makes it pleasant rather than punishing is that the vocabulary required is tiny. Nearly every useful rung in a four-letter ladder is a word a child would know. Unlike a crossword, you're never blocked because you don't happen to know a term — you're blocked because you haven't yet spotted a path. That's a much fairer kind of difficulty, and a much more satisfying one to overcome.
It's also the game here that most rewards slowing down. Rushing produces flailing; a minute of looking at both words properly usually produces a route. If you want something that asks less, the Word Connect guide covers the gentlest of the word games.