The crossword solution for the term 'ONE MAY BE COMPULSIVE' is LIAR, which is a four letter word. A LIAR is someone who habitually tells lies or untruths. Compulsive lying is a disorder in which a person feels an uncontrollable urge to lie, even when it is unnecessary or unhelpful. People with this disorder may lie about anything, from small, insignificant details to major life events. Compulsive lying can have serious consequences, including damaging relationships and leading to legal problems.