Unreliable and Unsound

Unreliable

Unreliable adjective - Not worthy of reliance or trust.
Usage example: in the early 1950s computers were large and expensive and unreliable

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

Nearby Words: unreliability, unreliably

Unsound

Unsound adjective - Of e.g. advice.

Unreliable is a synonym for unsound in dangerous topic. You can use "Unreliable" instead an adjective "Unsound", if it concerns topics such as flimsy, rickety, untenable. popular alternative

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