1. A reciprocal group action
   - return, getting even

Type of: group action

• Slavic language
• Slavic people
• Slavic race
• slavish
• slavishly
• slavocracy
• Slavonic
• Slavonic language
• Slavophile
• slaw
• slay
• slayer
• slaying
• SLE
• sleave
• sleaze
• sleazebag
• sleazeball
• sleazily
• sleaziness
• sleazy
• sled
• sled dog
• sledder
• sledding