Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
These are the Dome (top left), Wembley (under construction, top right), Westminster Abbey and St Paul's (bottom left), the Oval, Albert Hall and Gherkin (bottom right).
Source: https://londonist.com/london/history/a-brief-history-of-the-o2-millennium-dome