Atom-bomb and Thermonuclear bomb

Atom-bomb verb - Bomb with atomic weapons.

Thermonuclear bomb and atom-bomb are semantically related. in nuclear bomb topic. In some cases you can use "Thermonuclear bomb" instead a noun phrase "Atom-bomb".

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

Atom-bomb and thermonuclear bomb are semantically related. Sometimes you can replace phrase "Atom-bomb" with "Thermonuclear bomb", this phrases are similar.