The term COMPANION CLOSE refers to two words that are often used interchangeably. The first word is PAL, which is a 3-letter word meaning a close friend or companion. The second word is SIDEKICK, which is an 8-letter word meaning a close friend or companion who is often seen as a subordinate to the main character. Both words refer to someone who is a close friend or companion and can be used to describe a relationship between two people.