Formal:
* Seize: This is a very common synonym, often used in legal or official contexts.
* Appropriate: Implies taking something for one's own use, often without permission.
* Expropriate: Taking property for public use, often with compensation.
* Impound: To take something into official custody, often as a legal consequence.
Informal:
* Take away: This is a more casual synonym.
* Grab: This implies a quick and forceful taking.
* Snatch: This suggests a sudden and unexpected taking.
The best synonym to use will depend on the specific situation and the tone you want to convey.