Tonitruant is a relatively uncommon word that means loud or thunderous. There are several synonyms for tonitruant that can be used to describe something or someone that is making a loud noise. These include cacophonous, deafening, ear-splitting, resounding, reverberant, thundering, and uproarious. These words are useful in a variety of contexts, from describing a noisy concert or sports game to a thunderstorm or explosion. Using synonyms for tonitruant can help to add variety to your writing and make it more engaging for the reader. Whether you're writing a novel, a blog post, or a report, consider incorporating some of these synonyms to describe loud sounds in a powerful way.