Stable
Stable adjective - Marked by the ability to withstand stress without structural damage or distortion.
Usage example: the observation tower is stable enough to withstand the strongest winds without collapsing
Unstable
Unstable adjective - Not being in or able to maintain a state of balance.
Usage example: the minute we put the books down on the unstable desk, the whole stack went crashing to the floor
Nearby Word: unstably
Both words in one sentence
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Spending a career on that requires an existential trust in both stable and unstable influences that are constantly interchangeable.
Source: Series / NUMB3RS - If a gate goes unstable and disappears... In fact, one protagonist fell through a random, unstable gate as a child, but got lucky and was rescued when a stable gate was scouted nearby five years later.
Source: Literature / Time Scout - Rampancy is inherently unstable, and the holy grail of AI research is explicitly stated to be a stable rampant state.
Source: Instant A.I., Just Add Water
Cite this Source
Unstable and Stable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/stable/unstable
Stable & Unstable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/stable/unstable>.
Unstable or Stable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/stable/unstable.
Google Ngram Viewer shows how "stable" and "unstable" have occurred on timeline