API vs Service

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

API

Top 2,000 (common)

Service

Top 1,000 (very common)A2noun
Most common: Service
 APIService
Pronunciation🇬🇧 //eɪ.piː.aɪ//🇺🇸 //ˈeɪ.piː.aɪ//🇬🇧 /["/ˈsɜːvɪs/"]/🇺🇸 /["/ˈsɜːrvɪs/"]/
MeaningA way for different software programs to talk to each other.Help performed for someone, or a job in a business.
ExampleThe app uses an API to connect to the database.The restaurant offers excellent service to its customers.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-A2
Part of speechnoun
CollocationsAPI documentation, API endpoint, REST API, API key, public APIefficient, excellent, good, offer (somebody), provide (somebody with), operate, improve, deteriorate, provider, business, company, service for, service to, goods and services, products and services, efficient, excellent, good, offer (somebody), provide (somebody with), operate, improve, deteriorate, provider, business, company, service for, service to, goods and services, products and services, efficient, excellent, good, offer (somebody), provide (somebody with), operate, improve, deteriorate, provider, business, company, service for, service to, goods and services, products and services, efficient, excellent, first-class, deliver something (to somebody), give (somebody), offer (somebody), job, worker, meritorious, outstanding, faithful, do, see, begin, member, personnel, record, service to, conditions of service, in the service of your country, in the service of God, armed, go into, join, meritorious, outstanding, faithful, do, see, begin, member, personnel, record, service to, conditions of service, in the service of your country, in the service of God, great, invaluable, valuable, be of, do somebody, perform, charge, fee, at your service, services of, service to, church, religious, funeral, attend, go to, hold, service for, efficient, good, reliable, lay on, offer (somebody), provide (somebody with), in service, out of service, service between, great, invaluable, valuable, be of, do somebody, perform, charge, fee, at your service, services of, service to
Antonyms-neglect, abandon, disservice
Common mistakesConfused with 'IPA', which stands for International Phonetic Alphabet., Misunderstanding that APIs are a type of software rather than a way to connect software., Using 'API' in a plural form incorrectly, e.g., 'APIs' is appropriate when discussing multiple.Confused with 'serve' which is a verb., Using 'services' improperly as a singular noun., Confusing 'service' with 'servant' in a service context.
Usage notesCommonly used in tech and programming contexts. Avoid in casual conversations unless discussing tech. Usually not formal.Used in both formal and informal contexts. In business, it often refers to customer support. Avoid using in overly casual situations without context.

See it in real clips

Service

Frequently asked questions: API vs Service

What's the difference between API and Service?

API: A way for different software programs to talk to each other. Service: Help performed for someone, or a job in a business.

Which is more common: API and Service?

Service is the most common in everyday English.

Can you show an example of each?

API: The app uses an API to connect to the database. Service: The restaurant offers excellent service to its customers.

Can I use API and Service interchangeably?

Not always. API and Service 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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