different between antithesis vs euphuism

English

Borrowed from Latin antithesis, itself a borrowing from Ancient Greek ????????? (antíthesis). Surface analysis: anti- +? thesis.

antithesis (plural antitheses)

A proposition that is the diametric opposite of some other proposition.
(rhetoric) A device by which two contrasting ideas are juxtaposed in parallel form; a figure of speech arranged in this manner

From John Lyly's didactic romance Euphues: The Anatomy of Wit (1578), +? -ism.

euphuism (countable and uncountable, plural euphuisms)

(uncountable) An ornate style of writing (in Elizabethan England) marked by the excessive use of alliteration, antithesis and mythological similes.
An instance of euphuism.
- 1844, Edgar Allan Poe, Marginalia
  I have not the slightest faith in Carlyle. In ten years–possibly in five–he will be remembered only as a butt for sarcasm. His linguistic Euphuisms might very well have been taken as prima facie evidence of his philosophic ones; they were the froth which indicated, first, the shallowness, and secondly, the confusion of the waters.

Send