passersby is the correct plural of passerby. The word passerbyers is not a recognized word at all.
What Does Passerby Mean?
A passerby is a person who is walking past a place, often by chance. It’s someone who happens to see or witness something while passing through, not someone directly involved.
For example: “A passerby noticed the smoke and called for help.”
Passerby is a compound word. It’s built from three smaller words — “passer,” “by” — joined together to describe someone in the act of passing by.
More posts: Could You vs Can You: Which One Should You Use?
What’s the Correct Plural of Passerby?
This is where most confusion happens. English usually forms plurals by adding “-s” or “-es” to the end of a word. That rule works for thousands of words, but passerby doesn’t follow it.
Passersby
Because passerby is a compound noun, the plural “-s” attaches to the main noun — “passer” — not to the whole word. That gives us passersby, not “passerbys.”
Passerbyers
Passerbyers isn’t listed in any standard dictionary. It likely comes from people mishearing or misapplying regular plural rules to an irregular compound word.
| Word | Form | Correct? | Common Use |
|---|---|---|---|
| Passerby | Singular | Yes | One person walking past |
| Passersby | Plural | Yes | Two or more people walking past |
| Passerbys | Attempted plural | No | Common misspelling |
| Passerbyers | Attempted plural | No | Nonstandard, rarely used correctly |
Why Do People Confuse Passerbyers with Passersby?
Most English speakers instinctively add “-s” or “-ers” to make a word plural — think “runners,” “helpers,” “workers.”
That pattern feels natural, so it’s easy to apply it to passerby without realizing it’s a compound noun with its own rule.
Compound nouns like passerby, “mother-in-law,” and “runner-up” pluralize the core noun instead of the whole phrase.
That’s why we say “mothers-in-law” and “runners-up” — and why the correct form here is passersby.
More posts: Soo vs So: Which Spelling Is Correct?
Passerby, Passersby, and Passerbyers — Examples of Correct vs Incorrect Usage
Correct usage:
- A single passerby called 911 after the accident.
- Several passersby stopped to help the injured cyclist.
- Witnesses included two passersby and a shop owner.
Incorrect usage:
- Several “passerbyers” stopped to watch. ❌
- Two “passerbys” reported the incident. ❌
Tips to Remember the Correct Plural of Passerby
- Think of passerby as “passer” + “by.” Only “passer” changes to make it plural.
- Compare it to similar compound nouns: mother-in-law → mothers-in-law, runner-up → runners-up.
- If a plural sounds like it adds an extra syllable (“-yers“), that’s usually a sign it’s wrong.
FAQs About Passerby, Passersby, and Passerbyers
Is “passerbys” ever correct?
No. Passerbys is a common misspelling. The correct plural is always passersby.
Is “passerbyers” a real word?
No, passerbyers doesn’t appear in standard dictionaries and isn’t considered correct usage.
What is the plural of passerby?
The plural of passerby is passersby. This form is standard whether you’re writing formally or casually — British English follows the same rule.
Can I use “passersby” in formal writing?
Yes. Passersby is appropriate for news writing, reports, essays, and everyday conversation alike.
Conclusion
When comparing passerby vs passersby vs passerbyers, only two of these are real words: passerby for one person, and passersby for more than one. Passerbyers isn’t standard English, so it’s best avoided.
Remembering that passerby is a compound noun — and that only “passer” changes in the plural — makes it easy to get right every time.
Olivia Smith is the author and admin of GrammarAct, an informational grammar website. She writes clear guides, simple explanations, and helpful lessons to make grammar easy for everyone.
2 thoughts on “Passerbyers vs Passersby vs Passerby — Which One Is Correct?”