secret police 
noun [treated as plural]
A police force working in secret against a government’s political opponents.However, the new police lack any effective power against the Sandinista secret police or army....
- In places it was only Russian troops who protected the secret police from workers' anger.
- Ganev's career initially received a boost from his role as an official in the Stalinist secret police.
- dissociation
- dissociation constant
- dissociative
- dissolubility
- dissoluble
- dissolubly
- dissolute
- dissolutely
- dissoluteness
- dissolution
- dissolution of the monasteries
- dissolvable
- dissolve
- dissolvent
- dissonance
- dissonant
- dissonantly
- dissuade
- dissuader
- dissuasion
- dissuasive
- dissyllabic
- dissyllable
- dissymmetric
- dissymmetrical