Unreliable and Unstable

Unreliable

Unreliable adjective - Not worthy of reliance or trust.

Unstable is a synonym for unreliable in erratic topic. In some cases you can use "Unstable" instead an adjective "Unreliable", when it comes to topics like not true.

Nearby Words: unreliability, unreliably

Unstable

Unstable adjective - Likely to change frequently, suddenly, or unexpectedly.
Usage example: financial investors don't like an unstable economy

Unreliable is a synonym for unstable in unsteady topic. You can use "Unreliable" instead an adjective "Unstable", if it concerns topics such as changeable, erratic.

Nearby Word: unstably
Cite this Source
Unstable and Unreliable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/unreliable/unstable
Unreliable & Unstable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/unreliable/unstable>.
Unstable or Unreliable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/unreliable/unstable.
Google Ngram Viewer shows how "unreliable" and "unstable" have occurred on timeline