Commonly Confused Words

Capital vs. Capitol

1 min read

Capital and capitol sound identical, but their meanings are very different. One is used in many contexts, while the other is used in only one very specific situation.

Capital

Capital has several common meanings:

The main city of a country or region: Paris is the capital of France.
Money or assets used for investment: The company raised more capital.
Uppercase letters: Please write your name in capital letters.
Excellent or important (older usage): That’s a capital idea!

Capitol

Capitol refers only to a specific type of building:

The building where a government’s legislature meets.
Most famously, the U.S. Capitol in Washington, D.C.

In the United States, “Capitol” is capitalized when referring to the actual U.S. Capitol building.

💡 Tip

Capitol → building has a dome (think of the “o”).
Capital → everything else (city, money, letters).

Test your knowledge 📝

Question 1 sur 8Score: 0/8

Washington, D.C., is the ___ of the United States.

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Join 100,000 people who are improving their English skills on the Shaky English app

Other similar rules

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What Is an Appositive?

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Who vs. That

Ever wondered if you should say “the person who...” or “the person that...”? Let’s clear that up once and for all 👇 Who Who is used when you're talking about people. It introduces a clause that giv...

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Em Dash vs. En Dash vs. Hyphen

These three marks may look similar, but they each have their own job in writing. Let’s break them down so you know exactly when to use a hyphen, an en dash, or an em dash. Hyphen (-) Use a hyphen to...

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Mixing up then and than is super common — even for native speakers! But they have totally different meanings, and learning when to use each one will make your writing much clearer. Then Then is used...

Commonly Confused Words

Capital vs. Capitol

1 min read

Capital and capitol sound identical, but their meanings are very different. One is used in many contexts, while the other is used in only one very specific situation.

Capital

Capital has several common meanings:

The main city of a country or region: Paris is the capital of France.
Money or assets used for investment: The company raised more capital.
Uppercase letters: Please write your name in capital letters.
Excellent or important (older usage): That’s a capital idea!

Capitol

Capitol refers only to a specific type of building:

The building where a government’s legislature meets.
Most famously, the U.S. Capitol in Washington, D.C.

In the United States, “Capitol” is capitalized when referring to the actual U.S. Capitol building.

💡 Tip

Capitol → building has a dome (think of the “o”).
Capital → everything else (city, money, letters).

Test your knowledge 📝

Question 1 sur 8Score: 0/8

Washington, D.C., is the ___ of the United States.

Discover the app: Shaky English

Join 100,000 people who are improving their English skills on the Shaky English app

Other similar rules

Conjugation

What Is an Appositive?

Vocabulary

Punctuation in Parentheses

Common confusions

I.e. vs. E.g.

Common confusions

Who vs. That

Vocabulary

Em Dash vs. En Dash vs. Hyphen

Conjugation

Articles: A, An, The

Common mistakes

Conditional Forms (Zero, First, Second, Third)

Common confusions