hadron vs elementary particle

hadron and elementary particle both are nouns.

Word	Noun	Adjective	Verb	Adverb
hadron	Yes	No	No	No
elementary particle	Yes	No	No	No

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

hadron: any elementary particle that interacts strongly with other particles
elementary particle: (physics) a particle that is less complex than an atom; regarded as constituents of all matter

Other hypernyms of hadron include fundamental particle.

hadron (noun)	elementary particle (noun)
any elementary particle that interacts strongly with other particles	(physics) a particle that is less complex than an atom; regarded as constituents of all matter