boson vs meson

boson and meson both are nouns.

Word	Noun	Adjective	Verb	Adverb
boson	Yes	No	No	No
meson	Yes	No	No	No

As nouns, meson is a hyponym of boson; that is, meson is a word with a more specific, narrower meaning than boson:

boson: any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons
meson: an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0

Other hyponyms of boson include gauge boson, mesotron.

boson (noun)	meson (noun)
any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons	an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0