What are some words used back then that not today?

It's tricky to give a definitive list of words used "back then" that aren't used today, as the time frame you're referring to is unclear and language is constantly evolving!

To give you a better answer, could you tell me:

* What time period are you interested in? For example, are you curious about words from the Middle Ages, Victorian Era, or 1950s?

* What kind of words are you looking for? Are you interested in everyday words, slang, or more formal vocabulary?

Once you clarify these points, I can provide a more tailored list!