Other forms: thieveries
Use the noun thievery when you need a colorful, old fashioned way to describe stealing: you might complain bitterly about the thievery in your neighborhood after having your third bicycle stolen in a month.
If you're worried about thievery, you might install a burglar alarm or get a big barking dog. A more common way to say thievery is theft, or in a police report, larceny. It's easy to see where the word thievery comes from — to thieve is to steal, and both words come from the Old English root þeof, or thief.