The term 'RAT'S HOME' can be solved by the crossword solutions of LAB, DUMP, and SEWER. A laboratory is a place where scientific research is conducted, and it is also a place where rats may live. A DUMP is a place where trash and other waste is disposed of, and it is also a potential home for rats. Finally, a SEWER is an underground tunnel system that carries wastewater away from buildings, and it is also a common home for rats.