<span class="searchmatch">outthundering</span> present participle and gerund of outthunder...
<span class="searchmatch">outthundered</span> simple past and past participle of outthunder...
simple present outthunders, present participle <span class="searchmatch">outthundering</span>, simple past and past participle <span class="searchmatch">outthundered</span>) (transitive) To surpass in thundering; to thunder...