cola
Synonym discussion
Sense: noun/1
Cola, soda, pop, and soft drink all refer to carbonated beverages, but they differ in how specific they are. 'Cola' names a particular type — brown, sweet, and flavoured with cola-nut or caramel extracts (e.g., Coca-Cola or Pepsi). 'Soda' (common in the US) and 'pop' (common in the US Midwest and UK) are general terms for any carbonated drink, including lemon-lime or orange flavours. 'Soft drink' is the most formal and neutral term, used on labels and in official contexts. 'Fizzy drink' is very informal and common in British English. So if you ask for 'a cola', you get a specific brown drink; if you ask for 'a soda' or 'a pop', the server might ask which flavour.
Common collocations
Etymology
The word 'cola' comes from 'kola', the name of a West African tree whose nuts contain caffeine. The nuts were used as a flavouring in early cola drinks, starting in the late 1800s in the United States. The spelling changed from 'kola' to 'cola' when the first branded cola drinks appeared.