Setback vs. Set Back
“Setback” is a one-word noun for a problem or event that delays progress. “Set back” is a two-word phrasal verb used for delaying progress and, in another common sense, for costing someone an amount of money.
Use “setback” for the noun meaning a delay or reverse in progress. Use “set back” as the verb phrase, as in “The delay set us back two weeks.”
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| noun: a problem or delay that slows progress | setback | Use the closed noun. |
| verb: delay progress or make a schedule later | set back | Use the two-word phrasal verb. |
| verb: cost someone an amount of money | set back | The phrasal verb also has a documented cost sense. |
Quick tests
Meaning / construction test
Is the expression naming the delay/problem itself as a noun?
If yes: Use “setback.”
If no: If it is a verb meaning delay progress or cost an amount, use “set back.”
Caveat: The closed-versus-open distinction follows word class; the phrasal verb has more than one documented sense.
Examples
The permit delay was a major setback.
“Setback” is the noun naming the problem or reverse.
The storm set the project back by two days.
“Set back” is the verb meaning delay.
The repairs set us back several hundred dollars.
The two-word verb can also mean cost an amount.
Further guidance
Core difference
Use the documented noun or modifier form when naming a thing, result, person, or concept; use the spaced form when the words function as a verb.
Fast Test
If the expression can take ordinary verb tense or inflection in the sentence, the spaced verb form is usually the relevant choice.
Variant Boundary
Cambridge separates the noun “setback” from the phrasal verb “set back,” whose verb senses include delaying progress and costing someone money.
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.
- SETBACK — English meaning (opens in a new tab)Cambridge Dictionary · Setback noun form and meaning as a delay or problem in progress
- SET SOMEONE/SOMETHING BACK — English meaning (opens in a new tab)Cambridge Dictionary · Set back phrasal-verb form and delay/cost senses