Here are a few very unusual or seldom used English language words. Astonish people by correctly using them.
Acersecomic: A person whose hair has never been cut.
Biblioclasm: The practice of destroying, often ceremoniously, books or other written material and media.
Cacodemonomania: The pathological belief that one is inhabited by an evil spirit.
Dactylion: An anatomical landmark located at the tip of the middle finger.
Enantiodromia: The conversion of something into its opposite.
Fanfaronade: Swaggering; empty boasting; blustering manner or behavior; ostentatious display.
Gorgonize: To have a paralyzing or mesmerizing effect on. Synonyms: stupefy or petrify.
Hamartia: The character flaw or error of a tragic hero that leads to his downfall.
Infandous: Unspeakable or too odious to be expressed or mentioned.
Jettatura: The casting of an evil eye.
Ktenology: The science of putting people to death.
Leptosome: A person with a slender, thin, or frail body.
Montivagant: Wandering over hills and mountains.
Noegenesis: Production of knowledge.
Ostentiferous: Bringing omens or unnatural or supernatural manifestations.
Pogonotrophy: The act of cultivating, or growing and grooming, a mustache, beard, sideburns or other facial hair.
Quockerwodger: A rare nineteenth-century word for a wooden toy which briefly became a political insult.
Recumbentibus: A knockout punch, either verbal or physical.
Scripturient: Possessing a violent desire to write.
Tarantism: A disorder characterised by an uncontrollable urge to dance.
Ultracrepidarian: A person who gives opinions and advice on matters outside of one’s knowledge.
Vernalagnia: A romantic mood brought on by spring.
Welter: A confused mass; a jumble; turmoil or confusion.
Xenization: The act of traveling as a stranger.
Yonderly: Mentally or emotionally distant; absent-minded.
Zugzwang: A position in which any decision or move will result in problem.