Eminent is an adjective that nearly always goes ahead of its noun – “an 
eminent statesman” is a prominent statesman. Eminent is nearly always used to convey something positive or valued.
If I had known that my science professor was an 
eminent biologist, soon to be nominated for a Nobel Prize, I would have asked for his autograph before the course ended. 
“Her 
eminent good sense made her a godsend to our project.” (adapted from Wiktionary) 
Imminent is an adjective used for describing a moment 
when something is about to happen.  (If you can use the word 
'impending', then you already know how to use 'imminent'.)
The greedy heirs awaited the imminent death of their wealthy old uncle.
The imminent likelihood of a fire drill kept the teacher from giving a vocabulary quiz that day.
To 
assuage is to soothe, to comfort, to lessen the pain. Use ‘assuage’ in the emotional sense.
Kennedy felt that there was a diplomatic way to 
assuage Russia’s concerns.
Tom had been dumped by his girlfriend; it was impossible to 
assuage his feelings of grief and loss.
Apostrophe is a literary device that pertains to addressing someone or something that is absent.
“Judge, oh you gods, how dearly Caesar loved him” is a good example of 
apostrophe in Shakespeare’s plays.  (Caesar addresses the gods.)
John Donne invokes death in the 
apostrophe “Oh, Death, be not proud,” almost as if Death were a character in a play.  (Donne speaks to Death as though Death were a human listener.)
In the following 
apostrophe, Hamlet bitterly complains about the women in his life
: “Frailty, thy name is woman!”  (Hamlet addresses Frailty as if it were a person who could hear, speak, respond, etc.)
Allusion – an indirect reference to something that many readers or listeners are likely to know.
With his line about storming the beach-heads and pushing back the jungle, Kennedy 
alludes to Pacific-island warfare during World War II . 
The girl's 
allusions to hip-hop lyrics went straight over the teacher’s head.
Credulity is a near-perfect synonym for ‘gullibility’. It refers to people’s tendency to believe. 
Her 
credulity made her a good candidate for the man who claimed he could hypnotize people.
The 
credulous farmers bought the phony medicine from the traveling salesman. 
The greedy real estate agent played on the 
credulity of prospective buyers, showing them pictures of a lavish mansion when all he really had to sell was a log cabin.
Invective is a formal reference to cursing or foul 
language. In this sense, ‘invective’ is a collective adjective – it 
doesn’t really have a plural form (i.e., don’t say ‘invectives’). Also, 
in this sense, it is not used with an article (don’t use ‘the’ or ‘an’).
The coach’s foul 
invective along the sidelines got him kicked out of the game.
Danielle's cruel 
invective on the witness stand nearly got her removed from the courtroom.
Invective can also mean a
 rant. In this case, it’s OK to use ‘the’ or ‘an’.
A fine 
invective in Shakespeare occurs in 
King Lear, 
when Kent calls Oswald “A knave, a rascal, an eater of broken meats; a 
base, proud, shallow, beggarly, three-suited, hundred-pound, filthy 
worsted-stocking knave; a lily-livered, action-taking, whoreson, 
glass-gazing, super-serviceable, finical rogue; one-trunk-inheriting 
slave; one that wouldst be a bawd in way of good service, and art 
nothing but the composition of a knave, beggar, coward, pander, and the 
son and heir to a mongrel bitch: one whom I will beat into clamorous 
whining if thou deni'st the least syllable of thy addition." (
King Lear, Act II, sc. 2)
A cistern is a large barrel or metal tank of liquid – most often, water. The word is nearly always used in connection with water supply, irrigation, drainage, or the engineering of water.
“The city water line feeds into a rain-water 
cistern.” (rainwater.sustainablesources.com)
“Some people use rain-water collected in 
cisterns to water their gardens.” (earthsystemsnw.com)
 nostalgia is a yearning for the past.
The Park H.S. coach expressed his 
nostalgia for the days when he had a winning team.
reverie is a good synonym for day-dreaming.
The teacher interrupted her 
reverie with a question about the algebra problem.
I sometimes get lost in 
reverie about my days as a wilderness canoe guide.