This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, or marked by antithesis.

adj. Being in diametrical opposition. See Synonyms at opposite.

adj. Pertaining to antithesis, or opposition of words and sentiments; containing, or of the nature of, antithesis; contrasted.

Pertaining to or of the nature of antithesis; directly opposed or contrasted: as, these conceptions are antithetical.

Containing or abounding in antithesis; characterized by or making use of antithesis.

adj. sharply contrasted in character or purpose

"The Greek puts in antithetical juxtaposition, OUR, and His OWN"

different   

antitheticalness    antitheticality   

alphabetical    heretical    hypothetical    parenthetical    theoretical   

octosyllabic    inapplicable    undetectable    run-on    different    miltonic    epigrammatic    re-written    committeth    inadmissible