Wiktionary
thunder cloud
n. (alternative spelling of thundercloud English)
Usage examples of "thunder cloud".
Marmon sat on his stool in the corner, his head of silver hair shining like a summer thunder cloud and his handsome face anxious and worried.
But I am one of those that never take on about princely fortunes, and am quite content if the world is ready to board and lodge me, while I am putting up at this grim sign of the Thunder Cloud.