Oxymoron (noun)
Oxymoron [ ok-si-mawr-on, –mohr– ]
Definition: a figure of speech by which a locution produces an incongruous, seemingly self-contradictory effect, as in “cruel kindness” or “to make haste slowly.”
Source: https://www.dictionary.com/browse/oxymoron?s=t
Sentence: “I like gray areas; oxymorons and the feeling of falling backwards.”