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.

All we have to do is wait for them
to freeze, starve, and MUTINY.
Game of Thrones Season 5, Episode 8

Tie up her hands and feet, and take her
to the forge for MUTINY. Right now.
Money Heist Season 3, Episode 5

Speak up. Can't be worse than MUTINY.
Game of Thrones Season 5, Episode 10

This MUTINY
isn't your fault,
The Big Bang Theory Season 5, Episode 1

There was a MUTINY.
Game of Thrones Season 5, Episode 6