Based on the link below, this is my new favourite word:
Anyone got anything better?
logodaedaly
“Mellifluous” has always been one of my all-time favorites.
I’m also quite fond of “solace”, and " solitude" - just something relaxing about the way they sound
Defenestration.
Galoshes.
Porpentine.
I’ve always been partial to sesquipedalian (defined as “given to the use of long words”).
Although I must admit that floccinaucinihilipilification (“the act of esteeming something as worthless”) has a nice ring to it.
Barry
ichtyophagus
Gynotikolobomasophile. Someone who likes nibbling on women’s earlobes. 
titillating
Opabinia!
Wouldn’t it make sense to give definitions , too?
I’m also a fan of defenestration–the act of throwing someone out a window.
The word, I mean.
[hijack]
Hey, I know a guy whose last name is Freiheit. There can’t be too many of you. Where are you from.
[/hijack]
snivel
solipsistic - someone who holds the theory that the self can know nothing but its own modifications and that the self is the only existent thing.
Stypskipper-a fellow who lets a shaving cut just bleed down his neck.
Slagbagger-one who sells worthless goods as treasure. e.g. a pet rock salesman, a politician, a charlatan
It is a fabulous feeling indeed to tell a woman she’s looking callipygous, and hear her say, “Oh, why thank you!” She has earned it. Being callipygous is not an easy thing.
It is my belief that the word callipygian, which means the same as the OP’s callipygous, flows better as a word.
It carries the additional cachet of having been the subject of a Straight Dope Column:
If it’s great enough for Cecil, it’s great enough for me.