hothouse

1 a glass-enclosed building for growing plants grows tomatoes in his hothouse all winter long Synonyms glasshouse [chiefly British], greenhouse, conservatoryRelated Words cold frame, hot bed; nursery; botanical garden (also botanic garden)

2 a place or environment that favors the development of something an urban enclave of bohemians that acquired a reputation for being a hothouse of creativity Synonyms hotbed, breeding ground, nest, nidus, nursery, seedbed, seminaryRelated Words crucible; base, capital, center, core, cynosure, eye, focus, heart, hub, mecca, nucleus, seat; focus, headquarters