stable

[1]	stalls , horse barn

adj.

[1]	steady , solid , firm , sound , sturdy , strong , durable , well-founded , fast , sure , established , deep-rooted , stout
[2]	lasting , enduring , long-lasting , long-standing , secure , steadfast , steady , strong , unchanging , unchanged , unchangeable , unalterable , fixed , invariable , unwavering , immutable , permanent
[3]	sane , (well-)balanced , responsible , reasonable , sensible , competent , accountable
[4]	static , unchanging