k-meson vs meson

k-meson and meson both are nouns.

Word	Noun	Adjective	Verb	Adverb
k-meson	Yes	No	No	No
meson	Yes	No	No	No

As nouns, meson is a hypernym of k-meson; that is, meson is a word with a broader meaning than k-meson:

k-meson: an unstable meson produced as the result of a high-energy particle collision
meson: an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0

Other hypernyms of k-meson include mesotron.

k-meson (noun)	meson (noun)
an unstable meson produced as the result of a high-energy particle collision	an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0