Common
Irreplaceable
Both words in one sentence
- BattleMechs, for example, went from being almost irreplaceable to being relatively common, albeit expensive.
Source: Apocalypse Not -
Now Chaos has its own Super Soldiers, technology that was once common are now irreplaceable treasured relics, and the Emperor needs to burn the souls of a thousand psykers every day just to stay alive and keep the Imperial fleets running.
Source: Nothing Is the Same Anymore
Cite this Source
Irreplaceable and Common. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/common/irreplaceable
Common & Irreplaceable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/common/irreplaceable>.
Irreplaceable or Common. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/common/irreplaceable.
Google Ngram Viewer shows how "common" and "irreplaceable" have occurred on timeline