The term 'KIND OF ACTION' can be represented by three different crossword solutions: COVERT (6 letters), JOB (3 letters), and MOB (3 letters). COVERT is an adjective meaning 'secret or hidden, ' and it is often used to describe a type of action that is done in secret. JOB is a noun referring to a task or piece of work, and it can also refer to a kind of action that someone is expected to do. MOB is a noun referring to a large group of people, and it is often used to describe a kind of action that is done collectively by a group.