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.

...because ours exceeds yours
in both design and EXECUTION.
The Big Bang Theory Season 2, Episode 12

and sent me back up north
for a summary EXECUTION.
Game of Thrones Season 3, Episode 6

Uh, new salon topic: What's more important,
an idea or its EXECUTION?
The Big Bang Theory Season 8, Episode 18

It's all about the EXECUTION.
The Big Bang Theory Season 8, Episode 18

It’s not an EXECUTION, it’s an affray.
Put me through the Fábrica.
Money Heist Season 1, Episode 9