From Longman Dictionary of Contemporary Englishhotbedhot‧bed /ˈhɒtbed $ ˈhɑːt-/ noun → a hotbed of something
Examples from the Corpus
hotbed• You may know Quebec as a hotbed of ornery, croissant-munching separatists.• No longer does the complex have the reputation as a hotbed of Merseyside militancy.• The Ariadne, if I may put it that way, is a hotbed of super-sensitivity.• Vasey's, like any other establishment, was a hotbed of gossip.• Since the province was a hotbed of gentry resistance to the emancipation, confrontation looked a real possibility.• The Northern Band was centred in Kurunagala district, which was long considered the hotbed of the crime. 