From ra'am; a peal of thunder -- thunder.
see HEBREW ra'am
H7482. raam
רַ֫עַם noun [masculine] thunder; — ascribed to ׳ר י ׳׃ absolute Isaiah 29:6, רַ֑עַם בְּסֵתֶר Psalm 81:8 (Baer Gi; i.e. thunder-cloud); suffix רַעַמְךָ קוֺל 77:19; 104:7; construct גבורתו רַעַם Job 26:14 (figurative of ׳יs display of might; opposed to שֵׁמֶץ); figurative of captains, ׳ר שָׂרִים 39:25, i.e. thunderous shouting ( + תְּרוּעָה).