adjective
1.
Synonyms: sure 1, fast, firm, secure, staunch, strong
Related Word: balanced, poised; fixed, set, solid, sound, steadfast
Contrasted words: wobbling, wobbly
Antonyms: instable, unstable
2.
Synonyms: steady 2, constant, equable, even, stabile, unchanging, unfluctuating, uniform, unvarying
3.
Synonyms: lasting , diuturnal, durable, enduring, perdurable, perduring, permanent
Related Word: constant, steady; safe, secure, sound; resolute, staunch, steadfast
4.
marked by solidity, firmness, and stability especially in design or construction
a stable foundation for the building
Synonyms: firm, secure, solid, sound; compare fast 4, sure 1
Related Word: strong, sturdy; unassailable, unshakable
Idioms: as firm as (the rock of) Gibraltar, solid as a rock
Contrasted words: insecure, shaky, unsound, weak, wobbling, wobbly
Antonyms: instable, unstable