Viharas were for the purpose of living, Chaityas were assemblies for the purpose of discussions. Further, Chaityas were with Stupas, Viharas did not have stupas.
The land during the Gupta period can be classified into the following groups:Kshetra: Cultivable landKhila: Waste landAprahata: Jungle or forest landVasti: Habitable landGapata Sarah: Pasture land