Nuclear warhead and Thermonuclear bomb

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

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

Thermonuclear bomb noun - A nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium.

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