deuteron vs subatomic particle

deuteron and subatomic particle both are nouns.

Word	Noun	Adjective	Verb	Adverb
deuteron	Yes	No	No	No
subatomic particle	Yes	No	No	No

As nouns, subatomic particle is a hypernym of deuteron; that is, subatomic particle is a word with a broader meaning than deuteron:

deuteron: the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators
subatomic particle: a body having finite mass and internal structure but negligible dimensions

Other hypernyms of deuteron include particle.

deuteron (noun)	subatomic particle (noun)
the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators	a body having finite mass and internal structure but negligible dimensions