I usually try to look for words that are unusual yet easy to use in everyday conversation, or particularly unusual or commonplace meaning yet rarely used. This post is a word of the day on dictionary.com though. I chose it because I like how strange it looks, rather than indolence. (should I make indolence an entry?)
(an irrational but irresistible motive for a belief or action)
an insatiable desire : mania
An irresistible urge; mania.
Pronunciation: Cac as in cackle, rhymes with tack, track. O as in oh, troll, toll, foe, grow. E as in tree. Thes as in thesis.
I like how every source listed mania. Princeton did in synonyms.