"bullet" in the noun sense
1. bullet, slug
a projectile that is fired from a gun
2. bullet train, bullet
a high-speed passenger train
3. fastball, heater, smoke, hummer, bullet
baseball) a pitch thrown with maximum velocity
"he swung late on the fastball"
"he showed batters nothing but smoke"
Source: WordNet® (An amazing lexical database of English)
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