Setup vs. Set-up vs. Set Up
“Setup” is a noun and adjective for an arrangement, configuration, preparation process, or trick; Cambridge Business English also records “set-up.” “Set up” is the two-word phrasal verb meaning establish, arrange, or prepare.
Use “set up” for the verb. Use “setup” for the noun/adjective; “set-up” is also documented in Cambridge.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| an action: establish, arrange, prepare, or configure | set up | Use the two-word phrasal verb. |
| a thing/arrangement/configuration, or an attributive modifier | setup | Use the closed noun/adjective form in the documented senses. |
| a hyphenated noun form where that spelling is followed | set-up | Cambridge also documents the hyphenated noun form; do not use it as the verb. |
Quick tests
Meaning / construction test
Can you replace the expression with an action such as “arrange” or “prepare”?
If yes: Use “set up.”
If no: If it names the arrangement/configuration itself or modifies another noun, use “setup”; “set-up” is also a documented noun spelling.
Caveat: The sources establish word-class/spelling roles, not a universal house-style ban on the documented hyphenated noun.
Examples
We need to set up the projector before the meeting.
The expression is a verb meaning prepare or arrange.
The new setup takes only a few minutes to learn.
“Setup” is the noun naming the arrangement or configuration.
They tested the setup procedure twice.
“Setup” modifies “procedure” as an attributive form.
Further guidance
Core difference
The action is “set up”; the resulting arrangement or configuration is a “setup” or documented “set-up.”
Fast Test
If you can write “set it up” or “setting it up,” keep the verb as two words.
Variant Boundary
Cambridge records closed “setup” and hyphenated “set-up” in noun/adjective contexts, so the non-verb spelling is not a universal one-form rule.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- SETUP — English meaning (opens in a new tab)Cambridge Dictionary · Closed noun/adjective “setup” and hyphenated business variant “set-up”
- SET SOMETHING UP — English meaning (opens in a new tab)Cambridge Dictionary · Two-word phrasal verb “set up” and hyphenated noun “set-up”