single word requests - What is a term to refer to two ideas in exact opposition (e.g. good & bad, positive & negative)?



So basically, I know the name for both sides of a coin, yet not the coin itself.


In other words, when you refer to a coin, you don't want to say 'this object with one side heads, and the other tails', you would want to say 'this coin'. What I want is a general term to refer to two ideas, that are the absolute opposite to each other. I can't really use the word 'concept', or 'idea', because such words are already assigned to the very concepts/ideas themselves.



Answer



polar opposites:



polar opposite ‎(plural polar opposites):


The complete opposite, opposite in every way.



https://en.wiktionary.org/wiki/polar_opposite


"Polar opposites" might also refer to the scientific or technical definition of two things having exactly opposing or inverted polarity, sign, orientation, or some other property.


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