To take secretly in small quantities
A). Robbery
B). Pilferage
C). Theft
D). Defalcation
Pilferage
One word substitute is Pilferage.
Robbery: the action of taking property unlawfully from a person or place by force or threat of force.
Pilferage: the action of stealing things of little value.
Theft: the action or crime of stealing.
Defalcation: the taking or illegal use of money by someone who has responsibility for it, such as a company or government official.