Flinch vs Drawback - What's the difference?

As nouns the difference between flinch and drawback

is that flinch is a reflexive jerking away while drawback is a disadvantage; something that detracts or takes away.

is to make a sudden, involuntary movement in response to a (usually negative) stimulus.

(es)

A reflexive jerking away.

My eye doctor hates the flinch I have every time he tries to get near my eyes.

To make a sudden, involuntary movement in response to a (usually negative) stimulus.

* John Locke

A child, by a constant course of kindness, may be accustomed to bear very rough usage without flinching or complaining.

To dodge (a question), to avoid an unpleasant task or duty

To let the foot slip from a ball, when attempting to give a tight croquet.

(en noun)

A disadvantage; something that detracts or takes away.

Poor fuel economy is a common drawback among larger vehicles.

A partial refund of an import fee, as when goods are re-exported from the country that collected the fee.