stable
noun
a farm building for housing horses or other livestock
verb
shelter in a stable
“stable horses”
adjective
resistant to change of position or condition
“a stable ladder”
“a stable peace”
Oppositesunstablefirm and dependable; subject to little fluctuation
“the economy is stable”
not taking part readily in chemical change
maintaining equilibrium
showing little if any change
“a static population”
Source: WordNet 3.1, Princeton University