Bad
Bad adjective - Falling short of a standard.
Irreplaceable and bad are semantically related. In some cases you can use "Irreplaceable" instead an adjective "Bad".
Irreplaceable
Irreplaceable adjective - Impossible to replace.
Bad and irreplaceable are semantically related. Sometimes you can use "Bad" instead an adjective "Irreplaceable".
Both words in one sentence
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You can deliberately order a unit to break, which is generally a very bad idea considering that routing units take large losses and are nigh irreplaceable.
Source: Easy Communication - Naturally, the battle between the bad guys and the good guys destroyed lots of irreplaceable artifacts, and ended with the leader of the villain team, an alien being called Shadowspawn getting away with the sculpture while his teammates were all captured.
Source: Why We Can't Have Nice Things - The reckless nature of the combat landings underscores the danger Galactica is facing, in that they're willing to risk losing a fighter and the hanger to a bad crash rather than simply write off the entirely irreplaceable fighters or pilots for certain.
Source: Coming In Hot
Cite this Source
Irreplaceable and Bad. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/bad/irreplaceable
Bad & Irreplaceable. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/bad/irreplaceable>.
Irreplaceable or Bad. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/bad/irreplaceable.
Google Ngram Viewer shows how "bad" and "irreplaceable" have occurred on timeline