The term 'Green Eyed Monster' is a metaphor for JEALOUSY and ENVY. It is used to describe the feeling of being jealous or envious of someone else's success, possessions, or relationships. JEALOUSY is an 8-letter word that means feeling resentful or bitter towards someone because of their success or possessions. ENVY is a 4-letter word that means feeling resentful or bitter towards someone because of their relationships or qualities. Both words are used to describe the same emotion, but JEALOUSY is more focused on material possessions while ENVY is more focused on relationships and qualities.