I have been gathering more words to share. I prefer words that are rarely used, have a high sonic quality but are not– at least in my view– pretentious. Definitions courtesy of dictionary.com.
Exogenous. originating from outside; derived externally
Endogenous. proceeding from within; derived internally
Multitudinous. comprising many items, parts, or elements
Peripatetic. Walking about or from place to place; traveling on foot. Of or relating to the philosophy or teaching methods of Aristotle, who conducted discussions while walking about in the Lyceum of ancient Athens
Spate. a sudden, almost overwhelming, outpouring
Conurbation. A predominantly urban region including adjacent towns and suburbs; a metropolitan area.
I am always looking for more if you have some to share.