When you're writing an essay, a resume, or a quick text message, you might pause and wonder if high school is one word or two. It's a common spelling slip-up, especially since auto-correct and fast typing often blur the lines between distinct words.
The short answer is clear: high school written as two separate words is the only correct spelling when you're using it as a noun. The single-word version, highschool, is always incorrect in formal English. However, there's a catch involving hyphens when the phrase modifies another noun. Let's break down the rules so you never have to guess again.
The Core Rule: Two Words as a Noun
Whenever you're talking about the institution itself or the years you spent there, keep the words separate. High school is an open compound noun phrase, where "high" acts as an adjective describing the noun "school."
Think of it the same way you look at terms like elementary school, middle school, or law school. You wouldn't write lawschool or middleschool, and the same logic applies here.
- Correct: I'm starting my sophomore year of high school next month.
- Correct: She teaches English at the local high school.
- Incorrect: We spent our best years in highschool.
According to major style references like The Chicago Manual of Style and the Associated Press Stylebook, the open two-word form is the universal standard.
When to Use a Hyphen: High-School as a Modifier
Grammar gets a bit trickier when the phrase moves in front of another noun. If you're describing an event, a person, or an object associated with secondary education, you need a hyphen to form a compound adjective.
This rule prevents readers from getting tripped up. Without the hyphen, a phrase like "high school graduation" can look slightly clunky, but "high-school graduation" instantly signals that the two descriptive words are working together as a single unit to modify the noun "graduation."
- Correct: He proudly displayed his high-school diploma on the office wall.
- Correct: The annual high-school football game drew a massive crowd.
- Correct: She's a talented high-school track athlete.
Notice the pattern here. If the phrase sits right before the noun it modifies, hyphenate it. If it stands alone at the end of a sentence or acts as the subject, drop the hyphen and keep it as two separate words.
- Modifier: We attended a high-school reunion.
- Subject: Our high school is hosting a reunion this weekend.
Why Do People Write "Highschool"?
If the rule is so straightforward, why do so many people write highschool as a single word?
The shift usually comes down to how digital communication works. In modern texting, typing, and social media posting, people drop spaces to save time. Over decades, some English compound words do merge into a single word—for example, notebook, classroom, and weekend all started as separate words before fusing together.
Because education terms like kindergarten are single words, writers often assume highschool follows the same path. But linguists note that open compounds with descriptive modifiers tend to resist merging. Because "high" and "school" maintain distinct meanings, they've stayed as two separate words for well over a century. Auto-correct tools often fail to flag highschool because they recognize it as a string of letters, which only adds to the confusion.
Common Mistakes to Avoid
Even experienced writers slip up when rushing. Keep an eye out for these frequent errors:
- Fusing the noun: Writing "She works at a highschool" instead of "She works at a high school."
- Forgetting the hyphen in compound phrases: Writing "a high school teacher" without a hyphen when it precedes a noun (though note that in journalistic styles like AP, compound modifiers before nouns are sometimes left open if meaning is clear, but standard formal style prefers high-school teacher).
- Using plural forms incorrectly: It's high schools (plural on school, never highs school).
Frequently Asked Questions
Is "highschool" ever acceptable in casual writing?
You might see highschool in casual text messages, forum posts, or casual social media updates where speed matters more than grammar. However, it remains a spelling error in any formal, academic, or professional context.
How do I know whether to use a hyphen or a space?
Check the word's position in the sentence. If it comes directly before another noun it is describing (like high-school student), use a hyphen. If it functions as the name of the place or the subject of your sentence (like going to high school), use two separate words.
Are other school levels spelled the same way?
Yes. Terms like elementary school, middle school, and grad school follow the exact same rule. They are written as separate words when functioning as nouns and hyphenated when used as compound modifiers before another noun.
Does British English spell it differently?
No. Both American and British English standards agree on spelling it as two separate words (high school) for the noun form and hyphenating it when used as a compound modifier.
