different between clampdown vs crackdown

English

clamp +? down, from the phrasal verb.

clampdown (plural clampdowns)

A sudden repressive or punitive restriction or control
- 1994, Vincent Cable, The World's New Fissures: Identities in Crisis
  There is already in the EU a clamour for barriers against competing products from Eastern Europe and Asia, and for a Europe-wide clampdown on 'aliens'.

Noun use of the verb crack down.

crackdown (countable and uncountable, plural crackdowns)

Abruptly stern measures or disciplinary action; increased enforcement
- 2013 June 18, Simon Romero, "Protests Widen as Brazilians Chide Leaders," New York Times (retrieved 21 June 2013):
  After a harsh police crackdown last week fueled anger and swelled protests, President Dilma Rousseff, a former guerrilla who was imprisoned under the dictatorship and has now become the target of pointed criticism herself, tried to appease dissenters by embracing their cause on Tuesday.

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