kaon vs K particle

kaon and K particle both are nouns.

Word	Noun	Adjective	Verb	Adverb
kaon	Yes	No	No	No
K particle	Yes	No	No	No

As nouns, kaon and K particle are synonyms defined as:

kaon and K particle: an unstable meson produced as the result of a high-energy particle collision

Other synonyms of kaon include k-meson, kappa-meson.

kaon (noun)	K particle (noun)
an unstable meson produced as the result of a high-energy particle collision	an unstable meson produced as the result of a high-energy particle collision