Ill-advised and Madcap

Ill-advised adjective - Showing poor judgment especially in personal relationships or social situations.

Madcap is a synonym for ill-advised in brash topic. In some cases you can use "Madcap" instead an adjective phrase "Ill-advised", when it comes to topics like unwise.

Madcap adjective - Foolishly adventurous or bold.

Ill-advised is a synonym for madcap in reckless topic. You can use "Ill-advised" instead an adjective "Madcap", if it concerns topics such as brash, crazy.