For catching or capturing someone:
* Apprehend
* Arrest
* Catch
* Grab
* Seize
* Snatch
* Collar (informal)
* Get (informal)
* Bust (informal)
For stealing or taking something:
* Steal
* Take
* Snatch
* Grab
* Lift (informal)
* Pinch (informal)
For achieving something quickly and easily:
* Grab
* Secure
* Obtain
* Get
* Land (informal)
The best synonym will depend on the specific situation and the intended meaning.