Spelling

Here's a moment you've almost certainly had. You write organise and a spellchecker underlines it in angry red. Or you type color out of habit and a colleague gently "corrects" you. Or you sit staring at practise / practice, travelled / traveled, lift / elevator, wondering whether you're meant to pick a side — as if English were carrying two rulebooks in its back pocket and only one of them is the real one.

Here's the thing. Most of the time, you're not looking at two languages. You're looking at one shared engine — how words are built, the strategies that get spelling right, the habits that stop confusable pairs from colliding — running under two coats of paint. Sometimes that paint is thick: whole families of spellings diverge, a handful of past-tense forms go their own way, and everyday vocabulary quietly swaps out. Sometimes it's barely there at all: nearly all of how words are built, and most of the words people muddle, are exactly the same on both sides of the Atlantic.

This pillar is the map of both — the genuine forks and the large, reassuring common ground. It doesn't teach every rule on one page; that's what the individual guides are for. Its job is to show you the shape of the ground, so you know where to go for which question.

Nobody's born knowing which is which. Let's sort it out.

One language, two paint jobs

Let's be honest — people love to exaggerate the gap. UK English and US English are not foreign to each other. A Bristol diary and a Chicago work chat share the deep machinery: how a stem takes a suffix, how affect and effect trip people up regardless of postcode, how you can often reason your way to a spelling instead of memorising it cold.

Where they genuinely do fork, the forks fall into three families.

Spelling-system families. These are patterns, not one-off oddities — the -our / -or set (colour [US: color]), the -re / -er set (centre [US: center]), -ise / -ize, single versus double consonants before an ending (travelling [US: traveling]), defence [US: defense], and their cousins. Learn the family and you can apply it to words you've never met, rather than learning each pair by heart.

Irregular past forms. Most verbs behave identically everywhere. A small, high-frequency cluster diverges or half-diverges — learnt / learned, burnt / burned, got / gotten, dived / dove. Small, but visible in prose and in a marking scheme.

Vocabulary. Sometimes it isn't spelling at all — it's a different word for the same thing: flat / apartment, holiday / vacation, petrol / gas, biscuit / cookie. And occasionally the same spelling hides a different meaning entirely, which is where the genuinely funny misunderstandings live.

Everything else this pillar touches — general spelling strategies, the morphology of how English builds words, and most confusables — is shared machinery. UK and US writers reach for the same tools. Only the examples change.

Common Mistake: Treating every red-underlined word as a "UK vs US" problem. Plenty of underlines are simply wrong in both varieties — seperate, definately, recieve. Fix those with strategy and morphology first; only open the UK/US folders when the word is a known system pair or a vocabulary item.

The map: where to go inside this pillar

This is a hub, not a lesson — a hallway with a door to each room. Find the kind of problem you've got, then follow the link.

• A0 · Spelling systems (sub-hub) — The real UK/US spelling families at a glance: -our/-or, -re/-er, -ise/-ize, consonant-doubling, and friends — and how to pick a variety and stay in it. Start here for anything of the colour/color shape.
• B1 · Irregular past forms — The past tenses and participles that genuinely split (learnt/learned, got/gotten, dived/dove), which are safe everywhere, and how to keep your own writing from wobbling between dialects.
• C1 · Spelling strategies — Practical tactics that work on both sides of the Atlantic: sound-to-spelling reasoning, common letter patterns, and how to check yourself when a word looks almost right.
• C2 · Morphology — How English builds words from roots, prefixes, and suffixes — the shared engine under nearly all spelling. Once you see the joins, a surprising number of "hard words" stop being arbitrary.
• D0 · Confusables (sub-hub) — The look-alikes and sound-alikes that trip people up everywhere: affect/effect, principle/principal, complement/compliment, and the rest. Mostly English problems, not regional ones — this is the front door to all of them.
• E0 · Vocabulary (hub) — Everyday and workplace word differences (lift/elevator, jumper/sweater, boot of the car), which words are safe everywhere, and which ones to watch in cross-Atlantic writing.

Pro-Tip: Pick a home variety for a whole piece of writing — a school essay, a CV [US: resume], a client email — and stick to it. Mixing organise with color and pavement with apartment in one document is what makes writing look accidental. Consistency almost always matters more than which side of the Atlantic you favour.

What this pillar does not cover

Spelling and word choice love to wander into the neighbours' gardens. If I let them, we'd be teaching half the library twice over. So the borders are deliberate — and when your real question lives next door, you'll get a cleaner answer over there.

• its / it's, whose / who's, and possessive apostrophes live in Pillar 2. Those aren't spelling patterns; they're grammatical marks. We only mention the spelling of such pairs here — the rules themselves are Pillar 2's.
• Hyphenation, prefix hyphens, and compound spelling (email / e-mail, open versus closed compounds) live in Pillar 6. Morphology here may tell you something is a compound; Pillar 6 decides how you write the join.
• Capitalisation and proper adjectives (French versus french, British, place names) live in Pillar 7. Spelling the letters right doesn't settle whether the first one is a capital.
• The verb tense and aspect system — which form fits the sentence, and where UK and US usage of the perfect diverge — lives in Pillar 4. Spelt versus spelled may surface here as a shape question; whether a past form is the right choice is Pillar 4's job.

Pro-Tip: When you can't tell whether something is a genuine variety difference or a plain mistake, ask: "Would a careful UK editor and a careful US editor both mark this the same way?" If both would reject definately, it isn't a variety issue. If one prefers cancelled and the other canceled, it is.

A word on how this pillar is written

The underlying patterns — morphology, most strategies, nearly all confusables — are shared, so we teach one system. Where there's a surface difference, we flag the US form inline in square brackets, like this: colour [US: color]. And we don't invent differences; when UK and US English behave the same way, we say so plainly. Beware the folklore — "Americans never say got", "British English has no -ize" — plenty of -ize spellings are perfectly at home in British usage (Oxford's house style, for one).

The forks are real. The shared engine is bigger. Nobody's expected to hold all of this in their head at once — that's what the map is for. Find your question, follow the link, and let the right page do the work.

Roger Fielding — Bristol. Twenty-two years of making other people's sentences behave, and still has to double-check practise versus practice from time to time. The good news is, that's allowed.