1. Going from door to door getting candy on Halloween night

Encyclopedia: Trick-or-treating

• index of refraction
• index register
• index-linked
• indexation
• indexer
• indexical
• indexing
• indexless
• India
• India ink
• india paper
• India rubber
• India-rubber fig
• India-rubber plant
• India-rubber tree
• Indiaman
• Indian
• Indian agent
• Indian arrowroot
• Indian banyan
• Indian bean
• Indian beech
• Indian beet
• Indian blackwood
• Indian blanket