Harum-scarum and Knee-jerk

Harum-scarum adjective - Having or showing a lack of concern for the consequences of one's actions.

Knee-jerk and harum-scarum are semantically related. In some cases you can use "Knee-jerk" instead an adjective phrase "Harum-scarum".

Knee-jerk adjective - Done instantly and without conscious thought or decision.

Harum-scarum and knee-jerk are semantically related. Sometimes you can use "Harum-scarum" instead an adjective phrase "Knee-jerk".