Inside the Universes

Words with a similar base: frontier

[frontier.n.01] as in: a wilderness at the edge of a settled area of a country

[frontier.n.02] as in: an international boundary or the area (often fortified) immediately inside the boundary

[frontier.n.03] as in: an undeveloped field of study; a topic inviting research and development

					frontier (English)
└── fronter (Old French (842-ca. 1400))
    └── front (Old French (842-ca. 1400))