Encounter vs Run into

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

Encounter

Top 2,000 (common)B2verb

Run into

Top 2,000 (common)
 EncounterRun into
Pronunciation🇬🇧 /["/ɪnˈkaʊntə(r)/","/ɪnˈkaʊntəz/","/ɪnˈkaʊntəd/","/ɪnˈkaʊntərɪŋ/"]/🇺🇸 /["/ɪnˈkaʊntər/","/ɪnˈkaʊntərz/","/ɪnˈkaʊntərd/","/ɪnˈkaʊntərɪŋ/"]/🇬🇧 //rʌn ˈɪntuː//🇺🇸 //rʌn ˈɪntu//
Meaningto meet someone or something unexpectedlyto meet someone unexpectedly
ExampleWe **encountered** a number of **difficulties **in the first week.I ran into an old classmate at the grocery store.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2-
Part of speechverb
Collocationscommonly, frequently, often, be likely to, commonly, frequently, often, be likely torun into trouble, run into a friend, run into a problem
Antonymsavoid, escape, shunavoid, miss, evade
Common mistakesConfused with 'meet' — 'encounter' is less planned than 'meet'., Using 'encounter' only for negatives — it can describe positive or neutral experiences too., Incorrect verb forms — remember to use 'encountered' for past tense.Confused with 'run onto', meaning to reach a physical location., Using in the wrong tense, e.g., 'I run into him yesterday.', Confusing with 'bump into', which has a similar meaning.
Usage notesUse 'encounter' when talking about coming across someone or something unexpectedly. It is suitable in both spoken and written contexts, but can sound slightly formal in casual conversations.Use 'run into' when meeting someone by chance. It is appropriate in casual conversations but can also be used in more formal settings, though alternatives like 'encounter' may be preferred.

See it in real clips

Encounter
Run into

Frequently asked questions: Encounter vs Run into

What's the difference between Encounter and Run into?

Encounter: to meet someone or something unexpectedly Run into: to meet someone unexpectedly

Can you show an example of each?

Encounter: We **encountered** a number of **difficulties **in the first week. Run into: I ran into an old classmate at the grocery store.

Can I use Encounter and Run into interchangeably?

Not always. Encounter and Run into 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.