thunderous

English Thesaurus

1. extremely ominous (adj.all)

similar	:	unpropitious,
definition	:	not propitious (adj.all)

2. loud enough to cause (temporary) hearing loss (adj.all)

similar	:	loud,
definition	:	characterized by or producing sound of great volume or intensity (adj.all)

derivation	:	boom, roar, roaring, thunder,
definition	:	a deep prolonged loud noise (noun.event)

derivation	:	boom, roar, roaring, thunder,
definition	:	a deep prolonged loud noise (noun.event)