Foundation
foun·da·tion
/founˈdāSH(ə)n/
noun
noun: foundation; plural noun: foundations
1. the lowest load-bearing part of a building, typically below ground level.
2.an underlying basis or principle for something.
3.the action of establishing an institution or organization on a permanent basis, especially with an endowment.
Stability
/stəˈbilədē/
noun
the state of being stable.
firm, solid, steady, secure, fixed, fast, safe, moored, anchored, stuck down, immovable
"a stable tent"