Certain
Certain adjective - Having been established and usually not subject to change.
Usage example: a certain percentage of the profits will go to charity
Safe is a synonym for certain in undoubtable topic. In some cases you can use "Safe" instead an adjective "Certain".
Safe
Safe adjective - Unlikely to provoke controversy or offense.
Usage example: when chatting with strangers, she prefers to stick to safe topics such as the weather
Certain is a synonym for safe in risk-free topic. Sometimes you can use "Certain" instead an adjective "Safe", if it concerns topics such as not dangerous.
Mutual synonyms
Both words in one sentence
- And likewise, Jason Donald, the batter who was called safe is mostly known for said distinction, and even he was skeptical as to why he was called safe, he later said that he was certain he would have been called out.
Source: Never Live It Down / Sports - Fate/Zero: It's a safe assumption any character not Plot Armored by appearance in Fate/stay night is as good as dead; this is especially certain with any Servant other than Saber or Gilgamesh.
Source: Doomed by Canon -
Even gathering classes aren't safe, as some one of a kind resources are behind obstacles that only disappear if a certain enemy is killed.
Source: Video Game / Fantasy Life
Cite this Source
Safe and Certain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certain/safe
Certain & Safe. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certain/safe>.
Safe or Certain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certain/safe.
Google Ngram Viewer shows how "certain" and "safe" have occurred on timeline