gauge boson vs graviton

gauge boson and graviton both are nouns.

Word	Noun	Adjective	Verb	Adverb
gauge boson	Yes	No	No	No
graviton	Yes	No	No	No

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

gauge boson: a particle that mediates the interaction of two elementary particles
graviton: a gauge boson that mediates the (extremely weak) gravitational interactions between particles

Other hyponyms of gauge boson include gluon, intermediate vector boson, photon.

gauge boson (noun)	graviton (noun)
a particle that mediates the interaction of two elementary particles	a gauge boson that mediates the (extremely weak) gravitational interactions between particles