* Owady: This is the most general term for "insects" and can be used for bugs in general.
* Błędy: This literally translates to "errors" but can also refer to bugs in the sense of software bugs or mistakes.
* Robaki: This translates to "worms" but can also be used for other crawling insects, such as beetles.
* Pluskwy: This refers specifically to bed bugs.
So, depending on what kind of "bugs" you're talking about, the appropriate Polish word will vary.