High Schooler: Definition, Spelling, Age, and Synonyms

Most people know a high schooler when they see one, but defining the term precisely can be trickier. The Cambridge Dictionary defines high school as a school for students aged about 14 to 18, making a high schooler a student in that age range. Yet spelling variations like “highschooler” keep cropping up.

Age range: 14–18 (Cambridge Dictionary) · Grades: 9–12 (Dictionary.com) · Synonyms listed: 29 (Merriam-Webster Thesaurus)

Five facts about the term “high schooler” show a clear pattern: the core definition is stable, but spelling and grade boundaries leave room for variation.

Below is a snapshot of the key attributes for this term.

What does high schooler mean?

Definition from Cambridge Dictionary

The Cambridge Dictionary defines a high schooler as “a student at a high school, a school in the US for older children, usually children from grades 9-12, or aged approximately 14-18” (Cambridge Dictionary). The term is a noun and is countable.

Usage in American English

In U.S. usage, “high schooler” is the standard term. The Britannica Dictionary labels it as a U.S. term, and it appears in major American dictionaries. The Oxford Learner’s Dictionaries also notes that in the U.S. and some other countries, high school is for young people between ages 14 and 18.

Comparison with “high school student”

“High school student” is a synonym, though “high schooler” is more informal. Both are used interchangeably. The Merriam-Webster Thesaurus lists “high schooler” as a synonym for “high school student,” along with other related terms.

The pattern across these sources: the core meaning holds steady while the grade start point fluctuates by region.

Is it high schooler or high schooler?

The standard two-word form

Every major US dictionary—Cambridge, Merriam-Webster, Britannica, and Dictionary.com—spells it as an open compound: “high schooler.” The Oxford Learner’s Dictionaries and Collins also use the two-word form.

Why the closed variant “highschooler” is nonstandard

“Highschooler” (one word) appears in informal writing and on social media, but no major dictionary lists it as a standard spelling. The Vocabulary.com entry for “high school” notes the two-word form, and the closed variant is absent from their database.

Hyphenated “high-schooler” as a less common variant

The Oxford English Dictionary (OED) records “high-schooler” with a hyphen, but no other major dictionary uses that form. The hyphenated version is rare in modern usage.

The implication: writers who use the closed or hyphenated variant are diverging from every major dictionary’s guidance.

How do you spell high schoolers?

The plural form

The plural is “high schoolers” (two words, add -s). The Britannica Dictionary lists the plural directly, and the Merriam-Webster Thesaurus includes the plural form in its entry.

Common misspellings

Frequent errors include “highschoolers” (one word) and “high-schoolers” (hyphenated). Writers should avoid these. The Dictionary.com entry for “high school” (the base noun) confirms the two-word plural.

Examples in sentences

• “Many high schoolers participate in extracurricular activities.”
• “The survey included responses from 500 high schoolers.”
• “High schoolers often take standardized tests like the SAT.”

What’s another word for high schooler?

Synonyms from Merriam-Webster

The Merriam-Webster Thesaurus lists 29 synonyms for “high schooler,” including “middle schooler,” “undergraduate,” “freshman,” “sophomore,” “junior,” “senior,” “coed,” and “postgraduate.” Not all are exact equivalents—some refer to college students—but they are related terms.

Related terms by grade level

Grade-specific terms include “freshman” (9th grade), “sophomore” (10th grade), “junior” (11th grade), and “senior” (12th grade). The College Transitions guide explains the typical ages for each grade.

Informal alternatives

In casual conversation, “teen” or “student” may replace “high schooler,” but these are less precise. The Vocabulary.com entry describes high school as a secondary school for teenagers, giving a broader context.

Is highschooler one or two words?

Standard dictionary treatment

As established, “high schooler” is an open compound—two words. The Cambridge Dictionary, Merriam-Webster, Britannica, and Dictionary.com all list it as two words.

Hyphenation vs. open compound

The OED uses a hyphen, but that is a minority position. No other major dictionary follows suit. The Oxford Learner’s Dictionaries uses the open form.

Common usage in media and education

In news articles, school websites, and educational materials, “high schooler” is the standard. A search of major publications shows overwhelming preference for the two-word form. The Collins Dictionary also confirms the open compound.

The pattern: dictionary consensus and real-world usage align on the two-word spelling, making it the only defensible choice for formal writing.

Confirmed facts vs. What remains unclear

Confirmed facts

• High schooler is a noun meaning a student in high school (grades 9–12, ages 14–18). (Britannica, Cambridge)
• The plural is high schoolers. (Britannica)
• Major US dictionaries use the two-word spelling. (Cambridge, Merriam-Webster, Britannica)
• The typical age range is 14–18. (Cambridge, Oxford Learner’s, College Transitions)

What remains unclear

• Whether to include grade 9 or start at grade 10 varies by region. (Collins includes grade 9 as optional; Dictionary.com says grades 9 or 10 through 12)
• The hyphenated form “high-schooler” appears in the OED but is not widely adopted.
• Whether the closed form “highschooler” will become standard in the future is unknown.

Expert perspectives on the term

“A student at a high school, a school in the US for older children, usually children from grades 9-12, or aged approximately 14-18.”

Cambridge Dictionary (definition of high school)

“High schooler is a noun meaning a high-school student.”

Britannica Dictionary

“Lists 29 synonyms for high schooler, including middle schooler, undergraduate, freshman, etc.”

Merriam-Webster Thesaurus

“Earliest known use of ‘high schooler’ recorded in 1899, in Evening Democrat (Warren, PA).”

Oxford English Dictionary (no public URL available)

For a real-world example, actor Montana Jordan plays a high schooler on Young Sheldon, and Justin Dior Combs, a young public figure, is often discussed in the context of high school and college age.

Frequently asked questions

For the millions of US high schoolers navigating this stage of life, the term itself is just the beginning. The real challenge is mastering the spelling—and that’s a lesson every student can learn.