Coextensive and Double-edged

Coextensive adjective - Occupying the same space.

Double-edged and coextensive are semantically related. In some cases you can use "Double-edged" instead an adjective "Coextensive".

Double-edged adjective - Consisting of two members or parts that are usually joined.

Coextensive and double-edged are semantically related. Sometimes you can use "Coextensive" instead an adjective phrase "Double-edged".