it sounded like a freight train rushing down the tracks
Oh, dude, a good onomatopoeia for a train station would be something like "choo-choo," right? I mean, it's like the sound of the train chugging along the tracks, so it totally fits. Plus, it's a classic, so you can't really go wrong with that choice.
Yes, "choo-choo" is an onomatopoeia because it imitates the sound of a train whistle or a steam engine. It represents the repetitive sound of a train moving along the tracks.
onomatopoeia
Drip Splash
"Boom!"
Yes, "flick" is an example of an onomatopoeia because it imitates the sound that it represents.
Yes, "thundering" is considered onomatopoeia because it imitates the sound of thunder. Onomatopoeia refers to words that sound like the noise they are describing.
"Buzz" is a good example of onomatopoeia because the word imitates the sound of a bee flying.
ro ro
Yes it is an onomatopoeia
Yelled is not an onomatopoeia:)