pellet vs missile

pellet and missile both are nouns.

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

As nouns, missile is a hypernym of pellet; that is, missile is a word with a broader meaning than pellet:

pellet: a solid missile discharged from a firearm
missile: a weapon that is forcibly thrown or projected at a targets but is not self-propelled

Other hypernyms of pellet include projectile.

pellet (noun)	missile (noun)
a solid missile discharged from a firearm	a weapon that is forcibly thrown or projected at a targets but is not self-propelled
a small rounded mass of a substance	a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote control