But some of them seem useful!

This is the Grandiloquent Dictionary, the:

...result of an ongoing project to collect and distribute the most obscure and rare words in the English language.

But, really, even on the first page ('A' words), there are some useful ones.

Haven't we all met an:

aeolist

A pompous windy bore who pretends to have inspiration

or aren't we often guilty of:

abligurition

Excessive spending on food and drink

I don't dare go on, my friends think me pompous enough already!

Lori