I was chatting with my brother about some DIY stuff recently, and I somehow uttered two ‘words’ that immediately struck me as cool:
Grub screw
Plinth block
Which made me think about a whole litany of words that, IMHO, are just inherently cool – either because of the way they sound or what they mean.
Got any that come to mind ?
I wrote a poem (a tanka) about one … and it got published:
we both couldn’t sleep
infundibulum I said
is such a cool word
go back to sleep said my bride
but how can I now
Refrigerator/freezer
I’ll let myself out.
Bulbous
Bouffant
Macadamia
Gazebo
I was talking to my wife about fixing the microwave, and mentioned that it was likely a problem with the Magnetron.
She looked at me and said “really?”
Bespoke
Micturition syncope
Love this.
But also finding a large number of great words in a definition of infundibulum. I have underlined my favourites:
Therefore infundibulum is truly a hyper-cool word.
A few years ago, there was an Indian politician whose name sounded to me like Bodge-pie, and I thought that was surely the coolest name for a world leader. I later found it’s spelled with a V, but it’s still cool.
Mandibular sounds much more magnificent than its meaning.
Harmonic Balancer
I like it because it sounds like something vastly different than what it is.
Chiffarobe
Plectrum
Trundle
Crepuscular
Perfunctory
Haberdasher
Abscondery
Embiggens
Cromulent
Boomachuck
Chazwozzer
Highfalutin
*Garbanzo beans
defenestration.
A truly wonderful way to remove unwanted politicians. 
Plangent
Sitooterie
Some more I gleaned from a Christmas present book of rare and unusual words:
https://autolycus-london.blogspot.com/2007/12/some-christmas-logodaedaly.html?m=0
Mellifluous
Thalweg
Smorgasbord
therblig.
(the best thing about it is the origin: it’s the engineer’s name backwards (Gilbreth)