Restraint vs Diminution - What's the difference?

As nouns the difference between restraint and diminution

is that restraint is something that restrains, ties, fastens or secures while diminution is a lessening, decrease or reduction.

(wikipedia restraint)

(countable) something that restrains, ties, fastens or secures

Make sure all the restraints are tight.

(uncountable) control or caution; reserve

Try to exercise restraint when talking to your boss.

* November 2 2014 , Daniel Taylor, " Sergio Agüero strike wins derby for Manchester City against 10-man United," guardian.co.uk

City will feel nonplussed when they review the tape and Pellegrini had to summon all his restraint in the post-match interviews.

(en noun)

A lessening, decrease or reduction.

The new emission standards have produced a measurable diminution in air pollution.

(music) The shortening of the notes of a melody or theme.

* diminishment