A breeding ground is a place where animals or plants are bred and raised. The crossword solutions for the term 'breeding ground' include HOTBED (6 letters), NEST (4 letters), STUD (4 letters), HOTHOUSE (8 letters), CRADLE (6 letters), SPRUCE (6 letters), and ROOKERY (7 letters). A HOTBED is an area that is kept warm to encourage growth, while a NEST is a structure built by animals for protection and shelter. A STUD is a place where horses are bred, and a HOTHOUSE is a greenhouse that is kept at a higher temperature than normal. A CRADLE is a place of origin or a place of safety, while SPRUCE is a type of evergreen tree. Finally, a rookery is a breeding ground for birds.