I like persnickety alot.
I suspect my boss recently learned the word charrette since he’s been driving it into the ground just lately.
I recall an old SNL fake PSA promoting uvula health. The tagline was "It’ll behoove ya to care for your uvula "
been there, quoted that ;-D
Corybantic.
Loquacious.
Epicaricacy.
Panjandrum.
Caliginous.
Chiaroscuro.
I’m a fan of newer words like cromulent and enshittify.
Whenever possible, I like to put whilst into written communications. It just sounds classier.
Putrid is a word that one hopes not to have to use often, but if the situation calls for it, it’s at your service. Rancid also has a certain je ne sais quoi to it.
I’m a big fan of valitudinarian: basically, an obsessive hypochondriac who’s frequently annoyingly correct.
Thus, someone old is said to be in their anecdotage.
Foetid is my go-to in such situations.
I had occasion to use modicum recently, and had to explain what it meant.
Callipygian is a word I don’t often get to use in daily conversation.
I say quotidian so often that its use has become mundane, routine, unremarkable even. So I may eschew it for a while.
I’ve heard that it treats consternation well.
Yet, on the infrequent occasion, the perfect word! 
There’s a car dealer named Bob Loquercio that advertises on local television and I always think loquacious when his ads play.
An uncommon word I like to use is “circumspect”.
Interesting. I would’ve used “littoral” or “vulpine” in a similar circumstance.
I believe that any word with the suffix “tard” is off limits in today’s realm of civility.
Well lots of dancers will have to find a new word for leotard
Well, there goes mustard, along with custard and dastard and petard.
I never liked mustard