Shawm (pg 84) -- A medieval double-reed musical instrument.
Ricercar (pg. 144) -- A musical composition, instrumental, from the mostly Baroque era.
Zargon (pg. 342) -- Apparantly the argot of Vagabonds, according to the Urban Dictionary.
Qwghimian (pg. 370) -- Language of the fictional islands of Qwghlm.
Sabotage (pg. 444) -- I KNOW what it means, I was interested in the derivation of the word, related to "sabot', a wooden shoe.
Hexen (pg. 458) -- A German verb, "to practice sorcery". So I guess in this case, used as a noun, it practitioners of sorcery.
Obnubilated (pg. 480) -- Unclear, dim, less visible.
Whilom (pg. 562) -- Former; sometime, late, formerly.
Scudding (pg. 613) -- To run or skim along swiftly and easily.
Enconiums (pg. 623) -- Probably a mispeling of "Encomium", glowing and warmly enthusiastic praise.
Conventicles (pg. 629) -- An assembly for religious worship; especially : a secret meeting for worship not sanctioned by law.
Exaltation (pg. 669) -- An excessively intensified sense of well-being, power, or importance.
Exultation (pg. 669) -- The state of being exultant filled with or expressing great joy or triumph.
Antelier (pg. 683) -- A studio or workshop.
Extirpated (pg. 742) -- To destroy completely; to pull up by the root'; to cut out by surgery.
Discursive (pg. 742) -- Marked by analytical reasoning is the best defintion I could figure out here.
Ninehammers (pg. 745) -- Only 14 hits on Google for this word. Maybe a mispelling or "affection" of "ninnyhammers", which means "ninny", and that would seem to fit.
Spanish Netherlands -- Pretty much what is sounds like, now I know where it is.
Ganymede (]g. 826) -- Not just a moon, he was a Trojan prince kidnapped by Zeus to be his lover. Hera hated him.
Lambent sky (pg. 863) -- Softly bright or radiant.
Parlous (pg. 877) -- Full of danger or risk.
Enfeoffed (pg. 891) -- To invest with a fief or fee
...Pepys core of librarian-mercenaries... (pg. 909)
J'onn J'onzz (pg. 66) I had to Wikilook™ to refresh my memory. He was in Detective Comics, one of my favorites, back in the day.
proscenium (pg. 93) -- The part of a modern stage in front of the curtain.
woods colt pg. 261) -- A child born out of wedlock.
"They're not dead until they're warm and dead!" (pg.525)
I ran across this sentiment before, but I forget where...."it was on that very day that the brutes showed up and threatened the librarians. Who told them nothing, incidentally."
..."You'd think these would learn their lesson--librarians know how to keep quiet."
"It helps to ask politely," said Mr. Benedict
degustationary (pg. 214) -- The action or an instance of tasting especially in a series of small portions
"Who are these Fedders, anyway?" Mother asks. "Where are their people from?" -- pg 324