thunderous

Producing thunder or a similar sound.

Loud and unrestrained in a way that suggests thunder.

Thunder-producing; betokening thunder; awful.

Thundering; loud and deep-sounding; making a noise like thunder.

Producing thunder.

Making a noise like thunder; sounding loud and deep; sonorous.

Very loud; suggestive of thunder

loud enough to cause (temporary) hearing loss

extremely ominous