pellet vs buckshot

pellet and buckshot both are nouns.

Word	Noun	Adjective	Verb	Adverb
pellet	Yes	No	No	No
buckshot	Yes	No	No	No

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

Other hyponyms of pellet include BB, BB shot, bird shot, duck shot, grape, grapeshot, ball, musket ball.

pellet (noun)	buckshot (noun)
a solid missile discharged from a firearm	small lead shot for shotgun shells
a small rounded mass of a substance