Opening vs Window

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

Opening

Top 1,000 (very common)B2noun

Window

Top 1,000 (very common)A1noun
 OpeningWindow
Pronunciation🇬🇧 /["/ˈəʊpənɪŋ/"]/🇺🇸 /["/ˈəʊpənɪŋ/"]/🇬🇧 /["/ˈwɪndəʊ/"]/🇺🇸 /["/ˈwɪndəʊ/"]/
MeaningThe act of starting something, like a door or a conversation.An opening in a wall with glass to let light in.
ExampleThe opening of the new library was attended by the mayor.I looked out the window to see the garden.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelB2A1
Part of speechnounnoun
Collocationslarge, wide, narrow, cut, create, make, opening in, opening to, successful, chess, opening to, grand, formal, official, attend, celebrate, mark, ceremony, new, possible, clear, create, provide, give somebody, opening for, opening in, new, possible, clear, create, provide, give somebody, opening for, opening inbig, huge, large, gaze out (of), glance out (of), look out (of), close, open, break, frame, ledge, pane, at the window, by the window, in the window, active, pop-up, browser, open, close, minimize, pop up
Antonymsclosing, endingdoor, wall
Common mistakesConfusing 'opening' with 'opener' which is a tool or person that opens., Using 'opening' without an object, e.g., saying 'the opening' instead of 'the opening of the door'., Misusing tense; not matching 'opening' with the correct verb form.Confusing the term with 'door'., Using it in place of 'pane' when referring to glass., Not using 'the' when talking about a specific window.
Usage notesUse 'opening' in contexts like starting an event, conversation, or presenting a door. It's neutral and can be used in formal or informal settings.Widely used in both casual and formal contexts. Avoid when talking about computer interfaces; specify 'computer window' instead.

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Opening
Window

Frequently asked questions: Opening vs Window

What's the difference between Opening and Window?

Opening: The act of starting something, like a door or a conversation. Window: An opening in a wall with glass to let light in.

Which is more advanced: Opening and Window?

Opening is the highest level, at B2, on the CEFR scale.

Are Opening and Window the same CEFR level?

Opening: B2, Window: A1 on the CEFR scale.

What part of speech are Opening and Window?

Opening: noun, Window: noun.

Can you show an example of each?

Opening: The opening of the new library was attended by the mayor. Window: I looked out the window to see the garden.

Can I use Opening and Window interchangeably?

Not always. Opening and Window 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.