Every prevent synonym has its own strength. Stop is plain and complete, avert means a disaster was turned away, avoid means you kept clear of it, hinder only slows things down, and prohibit forbids by rule. Picking well tells your reader exactly how much was stopped.
The sections that follow list another word for prevent in each sense, a mild to strong scale, the preposition rules that catch writers out and the opposites.
Swatch at a glance
Best swaps
stop, avoid, avert, block, hinderPart of speech
VerbStrongest
preclude, prohibit, rule outMost casual
stop, head off, nip in the budMost formal
forestall, preclude, impedeAntonyms
allow, permit, enable, causeWatch out
Hinder and impede only make something harder. They do not mean it never happened.Word forms covered
prevents, prevented, preventing, prevention
Stop it fully, or only slow it down
The most useful split is between words that stop something completely and words that only get in the way.
| Word | Effect | Example |
|---|---|---|
| stop | full | A fence stops deer from eating the beans. |
| avert | full, danger turned away | Quick action averted a flood. |
| preclude | full, makes it impossible | A late form may preclude you from going on the trip. |
| hinder | partial | Fog hindered the search. |
| hamper | partial | Lack of staff hampered repairs. |
| deter | discourages a choice | Bright lights deter burglars. |
Prevent synonym strength, mild to strong
On the chip strip, discourage is the softest: it makes someone less likely to act. Hinder puts obstacles in the way. Block closes the path. Stop ends the action. Prohibit uses the power of a rule or a law, so it is about permission, not physical force. Choose the level that matches what really happened, especially in reports and safety notes.
Prepositions and patterns
Prevent takes from plus an ing verb: prevent pipes from freezing. Several swaps follow the same pattern: stop, keep, bar, prohibit and discourage (stop pipes from freezing, discourage kids from vaping). Others never take from.
- Avoid takes the ing verb directly: avoid getting sick.
- Avert and forestall take a noun: avert a crisis.
- Hinder can take a person plus from, or just a noun: hinder progress.
- Ban takes a noun: ban phones in class.
The avoid synonyms page covers keeping away from something in more depth.
Swaps in everyday sentences
- Wash your hands to prevent illness becomes wash your hands to ward off illness.
- The new rule prevents parking on the grass becomes the new rule prohibits parking on the grass.
- Talks prevented a strike becomes talks averted a strike.
- Heavy rain prevented progress becomes heavy rain slowed progress, if work still continued.
- Fixing small leaks prevents bigger problems becomes fixing small leaks heads off bigger problems.
Email to a landlord: "Please fix the window to prevent damage." Clearer: "Please fix the window before rain gets in and damages the floor." Naming the risk often works better than any synonym.
Prevented, preventing and prevention
For prevented, try averted, blocked, headed off or stopped. For preventing, try avoiding, guarding against or warding off. The noun prevention pairs with avoidance, protection, deterrence and control: fire prevention becomes fire safety in friendly writing. The adjective preventive, or preventative, means protective or precautionary.
Health leaflet: "Preventing the flu is easy." Warmer: "Guarding against the flu takes two simple steps."
Lookalike words with a twist
Avoid is about your own choice to stay clear; prevent is about stopping something happening at all, often to others. Forbid is personal and strict, like a parent forbidding a party. Thwart and foil mean stopping someone's plan, usually a bad one, so "the guard foiled the theft" works but "sunscreen foils sunburn" sounds odd. Reduce is not prevent: it means less, not none.
Antonyms and other verb pages
The opposite of prevent is allow, permit or let when you mean permission, and cause, enable or encourage when you mean making it happen.
- The new law permits street food stalls.
- Cheap loans enabled many small shops to open.
Both allow synonyms and action verbs carry this further.
Frequently asked questions
Which words replace prevent most often?
Stop, avoid, avert, block and hinder are the most common. Pick stop or avert when nothing happened, and hinder when it only slowed down.
Which prevent synonym suits formal writing?
Preclude, forestall and impede are formal. Preclude means making something impossible, often in legal or academic writing.
How do prevent and avoid differ?
You avoid something by staying away from it yourself. You prevent something by stopping it from happening, for yourself or others.
Can I use prohibit instead of prevent?
Only when a rule or law is doing the stopping. A sign can prohibit smoking, but a filter prevents smoke from spreading.
What is the opposite of prevent?
Allow, permit and let for permission, and cause or enable for making something happen.
How would you say prevent casually?
Stop, head off and nip in the bud are casual and friendly. Nip in the bud means stopping a problem while it is still small.