rat

rat - noun

any of various long-tailed rodents similar to but larger than a mouse

someone who works (or provides workers) during a strike

a person who is deemed to be despicable or contemptible

one who reveals confidential information in return for money

a pad (usually made of hair) worn as part of a woman's coiffure

rat - verb

desert one's party or group of friends, for example, for one's personal advantage
employ scabs or strike breakers in
take the place of work of someone on strike
give (hair) the appearance of being fuller by using a rat
catch rats, especially with dogs
give away information about somebody

rat - thesaurus

Scrabble score = 3