elementary particle vs particle

elementary particle and particle both are nouns.

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

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

elementary particle: (physics) a particle that is less complex than an atom; regarded as constituents of all matter
particle: a body having finite mass and internal structure but negligible dimensions

Other hypernyms of elementary particle include subatomic particle.

elementary particle (noun)	particle (noun)
(physics) a particle that is less complex than an atom; regarded as constituents of all matter	a function word that can be used in English to form phrasal verbs
	a body having finite mass and internal structure but negligible dimensions
	(nontechnical usage) a tiny piece of anything