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.

We declare just enough
not to arouse SUSPICION...
Breaking Bad Season 3, Episode 11

But it was my SUSPICION, yes, as to
why he invited me into his home.
Breaking Bad Season 4, Episode 8

Heightened aggression
and SUSPICION.
Westworld Season 2, Episode 5

Well, she and her brother are both being held
under fair SUSPICION.
Game of Thrones Season 5, Episode 7

We don't wanna arouse SUSPICION
by not trying to get a good deal.
Breaking Bad Season 4, Episode 3