Collocations for thunder - noun

loud
The thunder was getting louder and louder.

dull
The gunfire rumbled like dull thunder.

distant
the rumble of distant thunder

approaching

clap, crash, peal, roll, rumble

boom, break, burst, crash, explode, roar
Thunder boomed in the sky overhead.

growl, grumble, roll, rumble | rattle sth, shake sth
The windows were shaken by a tremendous crash of thunder.

clap (also ‘thunderclap’) | cloud (also ‘thundercloud’)

the sound of thunder, there''s thunder in the air
(= thunder is likely),

thunder and lightning