Uncommon

trenchant
[tren-chuhnt]
incisive or keen, as language or a person; caustic; cutting

tryst
[trist, trahyst]
a private romantic rendezvous between lovers

detectorist
[dɪˈtɛktərɪst]
a person whose hobby is using a metal detector

reify
[ree-uh-fahy]
to convert into or regard as a concrete thing

maelstrom
[meyl-struhm]
a large, powerful, or violent whirlpool.

charlatan
[shahr-luh-tn]
a person who pretends or claims to have more knowledge or skill than he or she possesses; quack

vicissitude
[vi-sis-i-tood]
a change or variation occurring in the course of something

abnegate
[ab-ni-geyt]
renounce or reject (something desired or valuable)

snickersnee
[snik-er-snee]
a knife, especially one used as a weapon.

quotidian
[kwoh-tid-ee-uh]
daily

placid
[plas-id]
pleasantly calm or peaceful; unruffled; tranquil; serenely quiet or undisturbed

winsome
[win-suhm]
sweetly or innocently charming; winning; engaging

pellucid
[puh-loo-sid]
allowing the maximum passage of light, as glass; translucent; clear

antediluvian
[an-tee-di-loo-vee-uhn]
very old, old-fashioned, or out of date; antiquated; primitive

taradiddle
[tar-uh-did-l]
a small lie; fib

crapulous
[krap-yuh-luhs]
given to or characterized by gross excess in drinking or eating

sycophant
[sik-uh-fuhnt, sik-uh-fant]
a self-seeking, servile flatterer; fawning parasite

ephemera
[ih-fem-er-uh]
things that exist or are used or enjoyed for only a short time.

zeitgeist
[tsahyt-gahyst]
the defining spirit or mood of a particular period of history as shown by the ideas and beliefs of the time

draconian
[drey-koh-nee-uhn]
excessively harsh and severe

inveigh
[in-vey]
to protest or complain bitterly or vehemently

inordinate
[in-awr-dn-it]
unusually or disproportionately large; excessive

fecund
[fee-kuhn]
producing or capable of producing offspring, fruit, vegetation, etc. in abundance; prolific; fruitful

inimitable
[ih-nim-i-tuh-buhl]
incapable of being imitated or copied; surpassing imitation; matchless