Injudicious and Spur-of-the-moment

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

Spur-of-the-moment and injudicious are semantically related. in ill-considered topic. In some cases you can use "Spur-of-the-moment" instead an adjective "Injudicious".

Spur-of-the-moment adjective - Made or done without previous thought or preparation.

Injudicious and spur-of-the-moment are semantically related. Sometimes you can use "Injudicious" instead an adjective phrase "Spur-of-the-moment".