Fission bomb and Nuclear warhead

Fission bomb noun - A nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239).

Nuclear warhead and fission bomb are semantically related in nuclear bomb topic. In some cases you can use "Nuclear warhead" instead a noun phrase "Fission bomb", when it comes to topics like atomic bomb.

Nuclear warhead noun - The warhead of a missile designed to deliver an atom bomb.

Fission bomb and nuclear warhead are semantically related in nuclear bomb topic. You can use "Fission bomb" instead a noun phrase "Nuclear warhead", if it concerns topics such as atomic bomb.