Guard vs Keep watch

When to use each in English, with meaning, register, and examples.

Guard

Top 1,000 (very common)B1noun

Keep watch

Top 3,000 (common)
Most common: Guard
 GuardKeep watch
Pronunciation🇬🇧 /["/ɡɑːd/"]/🇺🇸 /["/ɡɑːrd/"]/🇬🇧 //kiːp wɒtʃ//🇺🇸 //kiːp wɑtʃ//
MeaningTo protect or keep safe.To stay alert or pay attention, especially for danger.
ExampleThe guard stood at the entrance to the building.He was asked to keep watch over the campsite at night.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelB1-
Part of speechnoun
Collocationsarmed, uniformed, border, post, station, patrol something, protect something, escort somebody, duty, dog, close, 24-hour, constant, off (your) guard, on (your) guard, under guard, drop your guard, keep guard of something, keep your guard up, civil, national, palace, change, call out, guard of honour/​honor, civil, national, palace, change, call out, guard of honour/​honor, trigger, fire, shinkeep watch over, keep a close watch, keep watch for, keep watch at night, keep vigilant watch
Antonymsabandon, release, expose-
Common mistakesConfused with 'warden' — a guard protects but a warden manages., Using 'guard' without an object — always specify what is being guarded., Mixing up 'guard' with 'greet' — they have different meanings.Confused with 'keep an eye on', which suggests a less formal level of vigilance., Using inappropriately in passive voice, as 'watch kept' sounds unnatural.
Usage notesUse 'guard' when talking about protecting someone or something. It's appropriate in most contexts, but less common in casual conversations.Used when monitoring a situation or being vigilant. Appropriate in both formal and informal contexts when discussing safety or alertness.

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Guard
Keep watch

Frequently asked questions: Guard vs Keep watch

What's the difference between Guard and Keep watch?

Guard: To protect or keep safe. Keep watch: To stay alert or pay attention, especially for danger.

Which is more common: Guard and Keep watch?

Guard is the most common in everyday English.

Can you show an example of each?

Guard: The guard stood at the entrance to the building. Keep watch: He was asked to keep watch over the campsite at night.

Can I use Guard and Keep watch interchangeably?

Not always. Guard and Keep watch are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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