- 世界【せかい】 - the world, society, the universe, sphere, circle, world, world-renowned, world-famous, realm governed by one Buddha, space 
- 限界【げんかい】 - limit, bound 
- 世界中【せかいじゅう】 - around the world, throughout the world 
- 世界一【せかいいち】 - best in the world 
- 結界【けっかい】 - (fixing) boundaries for religious practices, prohibition (of items, people, spirits, etc. that would hinder Buddhist practice), fence between inner and outer sanctums in a temple, short two or three-fold lattice around the front desk of a store, barrier, dimensional barrier, containment zone, containment barrier, mystical barrier 
- 世界的【せかいてき】 - worldwide, global, international, universal, world-famous, world-class 
- 視界【しかい】 - field of vision, visibility, view, visual field, (one's) ken 
- 政界【せいかい】 - (world of) politics, political world, political circles 
- 財界【ざいかい】 - financial world, business circles 
- 全世界【ぜんせかい】 - the whole world 
- 人間界【にんげんかい】 - human realm, world of humans, terrestrial world 
- 境界【きょうかい】 - boundary, border, limit, bounds, frontier 
- 新世界【しんせかい】 - New World (esp. the Americas, but also Australasia), new world 
- 学界【がっかい】 - academic world, academia, academic circles, scientific world, learned circles 
- 界隈【かいわい】 - neighborhood, neighbourhood, vicinity 
- 外界【がいかい】 - outside world, physical world 
- 法曹界【ほうそうかい】 - legal circles 
- 経済界【けいざいかい】 - economic world, financial circles, business community 
- 産業界【さんぎょうかい】 - the industrial world 
- 魔界【まかい】 - demon world