trilogy /trilˈə-ji/

1. Any group of three works, such as novels, plays, etc
2. A group of three related Greek tragedies, orig performed together
3. A triad

• black hole
• black holes
• black horehound
• black house
• black houses
• black ice
• blacking
• blackings
• black in the face
• blackish
• blackjack
• blackjacked
• blackjacking
• blackjacks
• black knight
• black knights
• blacklead
• blackleads
• blackleg
• blacklegged
• blacklegging
• blacklegs
• black letter
• black letters
• black light