Thesaurus / land bridge
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLE SENTENCES FROM THE WEB

Why didn't they cross into Australia, like the opossum, by the land bridge then existent between that continent and South America?
On the land bridge of Asia Minor they are represented by the Armenians.
INDIAN MYTH AND LEGENDDONALD ALEXANDER MACKENZIE
They may have come into America across the Siberia-Alaska land bridge a million or so years ago.

WORDS RELATED TO LAND BRIDGE

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.