The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

I lived in the CHAOS.
Westworld Season 3, Episode 8

we find ourselves
in CHAOS again,
Westworld Season 3, Episode 8

Chaos isn't a pit.
Game of Thrones Season 3, Episode 6

The plan was intended to create CHAOS.
Money Heist Season 3, Episode 2

It's simple CHAOS.
Breaking Bad Season 3, Episode 10