kappa-meson vs K particle

kappa-meson and K particle both are nouns.

Word	Noun	Adjective	Verb	Adverb
kappa-meson	Yes	No	No	No
K particle	Yes	No	No	No

As nouns, kappa-meson and K particle are synonyms defined as:

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

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

kappa-meson (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