hummer vs bullet

hummer and bullet both are nouns.

Word	Noun	Adjective	Verb	Adverb
hummer	Yes	No	No	No
bullet	Yes	No	No	No

As nouns, hummer and bullet are synonyms defined as:

Other synonyms of hummer include fastball, heater, smoke.

hummer (noun)	bullet (noun)
(baseball) a pitch thrown with maximum velocity	(baseball) a pitch thrown with maximum velocity
a singer who produces a tune without opening the lips or forming words	a projectile that is fired from a gun
	a high-speed passenger train