loud
The thunder was getting louder and louder.

rolling, rumbling
distant
the rumble of distant thunder

clap, crack, crash, peal, roll, rumble

boom, crack, crash, roar
Thunder boomed in the sky overhead.

growl, roll, rumble, sound
A crash of thunder sounded in the distance.

echo
rattle sth, shake sth
The windows were shaken by a tremendous crash of thunder.

clap (usually thunderclap)
cloud (usually thundercloud)

thunder of (figurative)
She could hear the thunder of hoofs approaching.

the sound of thunder, thunder and lightning

Thunder is used with these nouns as the subject:
cannon, train