Bull's-eye and Lantern

Bull's-eye noun - A lantern with a single opening and a sliding panel that can be closed to conceal the light.

Lantern and bull's-eye are semantically related. In some cases you can use "Lantern" instead a noun phrase "Bull's-eye".

Lantern noun - Light in a transparent protective case.

Bull's-eye and lantern are semantically related. Sometimes you can replace phrase "Bull's-eye" with "Lantern", this terms are similar.