20 Advanced Vocabulary You Should Know! 1. Antediluvian – Extremely old or outdated.2. Peregrinate – To travel or wander from place to place.3. Nugatory – Of no value or importance; trifling.4. Recrudescence – A new outbreak after a period of inactivity.5. Ineluctable – Impossible to avoid or escape; inevitable.6. Concatenate – To link things together in a series or chain.7. Peroration – The concluding part of a speech, typically intended to inspire.8. Insouciance – Casual lack of concern; indifference.9. Sesquipedalian – Characterized by long words; long-winded.10. Excoriate – To criticize severely and publicly.11. Calumny – A false statement made to damage someone's reputation.12. Opprobrium – Public disgrace or harsh criticism.13. Apotheosis – The highest point in the development of something; a perfect example.14. Contumacious – Stubbornly or willfully disobedient to authority.15. Pulverulent – Consisting of or reduced to dust or powder.16. Manqué – A person who has failed to live up to expectations or ambitions.17. Paroxysm – A sudden violent outburst (of emotion or activity).18. Imprecation – A spoken curse or invocation of evil.19. Inchoate – Just begun and not fully formed or developed.20. Cacophony – A harsh, discordant mixture of sounds.