crack·down 
(krăkdoun′)
(krăkdoun′)n.
An act or example of forceful regulation, repression, or restraint: a crackdown on crime.
- cryptographic
- cryptographically
- cryptography
- crypto-Jew
- cryptologic
- cryptological
- cryptologist
- cryptology
- cryptomeria
- cryptonym
- cryptorchid
- cryptorchidism
- cryptorchism
- cryptosporidiosis
- cryptosporidium
- cryptozoite
- cryptozoological
- cryptozoologist
- cryptozoology
- cry/say uncle
- crystal
- crystal ball
- crystal clear
- crystal-clear
- crystal detector