The term 'plain abode' can be solved by the five-letter word 'TEPEE'. A TEPEE is a type of dwelling traditionally used by Native American tribes. It is a conical tent made of animal skins or birch bark and wooden poles, and is designed to be easily dismantled and moved. Tepees were used as temporary homes for nomadic tribes, and were often decorated with symbols and artwork that represented the tribe's culture and beliefs.