thermonuclear bomb vs H-bomb

thermonuclear bomb and H-bomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
thermonuclear bomb	Yes	No	No	No
H-bomb	Yes	No	No	No

As nouns, thermonuclear bomb and H-bomb are synonyms defined as:

thermonuclear bomb and H-bomb: a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium

Other synonyms of thermonuclear bomb include fusion bomb, hydrogen bomb.

thermonuclear bomb (noun)	H-bomb (noun)
a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium	a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium