1. RATIFY (VERB): confirm Synonyms: approve, sanction Antonyms: reject Example Sentence: Both countries were due to ratify the treaty by the end of the year.
2. NEFARIOUS (ADJECTIVE): wicked Synonyms: evil, sinful Antonyms: good Example Sentence: The nefarious activities of the organized-crime syndicates.
3. HEGEMONY (NOUN): leadership Synonyms: dominance, dominion Antonyms: self-government Example Sentence: Germany was united under Prussian hegemony after 1871.
4. ENORMITY (NOUN): wickedness Synonyms: baseness, blackness Antonyms: goodness Example Sentence: The enormities of war are way too high as expected.
5. ABOLITION (NOUN): scrapping Synonyms: ending, stopping Antonyms: retention Example Sentence: He was responsible for the abolition of the death penalty.
6. INTRANSIGENT (ADJECTIVE): uncompromising Synonyms: inflexible, unbending Antonyms: compliant Example Sentence: Her father had tried persuasion, but she was intransigent.
7. ORATORICAL (ADJECTIVE): rhetorical Synonyms: grandiloquent, magniloquent Antonyms: plain-spoken Example Sentence: He has plenty oratorical skills.
8. SHUN (VERB): avoid Synonyms: evade eschew Antonyms: accept Example Sentence: He shunned fashionable society.
9. PROTRUDE (VERB): : stick out Synonyms: jut, project Antonyms: sunken Example Sentence: It was something like a fin protruded from the water.
10. SHAMBOLIC (ADJECTIVE): : chaotic Synonyms: disorganized muddled Antonyms: efficient Example Sentence: The department's shambolic accounting led to company’s downfall.
11. ALACRITY (NOUN): eagerness Synonyms: willingness, readiness Antonyms: apathy Example Sentence: She accepted the invitation with pure alacrity.
12. ABJECT (ADJECTIVE): obsequious Synonyms: grovelling, crawling Antonyms: proud Example Sentence: An abject apology came from his end today.
13. STIFLE (VERB): constrain Synonyms: hinder, hamper Antonyms: encourage Example Sentence: High taxes were stifling private enterprise.
14. CUMBERSOME (ADJECTIVE): unwieldy Synonyms: unmanageable, awkward Antonyms: manageable Example Sentence: Diving suits are usually cumbersome.
15. DECIPHER (VERB): decode Synonyms: decrypt, break Antonyms: encode Example Sentence: Authorized government agencies can decipher encrypted telecommunications.
16. SCURRILOUS (ADJECTIVE): abusive Synonyms: vituperative, derogatory Antonyms: praising Example Sentence: It was a scurrilous attack on his integrity.
17. MUFFLE (VERB): deaden Synonyms: dull, dampen Antonyms: loud Example Sentence: His voice was muffled due to the distance.
18. TRANSGRESS (VERB): misbehave Synonyms: err lapse Antonyms: obey Example Sentence: She had transgressed an unwritten social law.