heavyweight torpedo vs heavy torpedo

heavyweight torpedo and heavy torpedo both are nouns.

Word	Noun	Adjective	Verb	Adverb
heavyweight torpedo	Yes	No	No	No
heavy torpedo	Yes	No	No	No

As nouns, heavyweight torpedo and heavy torpedo are synonyms defined as:

heavyweight torpedo and heavy torpedo: a torpedo that carries a warhead of at least 450 kg, used primarily as a standoff weapon, particularly by submerged submarines.

heavyweight torpedo (noun)	heavy torpedo (noun)
a torpedo that carries a warhead of at least 450 kg, used primarily as a standoff weapon, particularly by submerged submarines.	a torpedo that carries a warhead of at least 450 kg, used primarily as a standoff weapon, particularly by submerged submarines.