"Deception" is the act of purposely making something false appear to be true. Thus, the best answer choice is "deceit," as a "deceit" also means the act of purposely making something false appear to be true. "Satire" and "ridicule" both refer to the act of making fun of something or someone, and "inconstant" means ever-changing; these answer choices are not as close to "delusion" in meaning as is "deception."

"Tumult" means commotion or uproar, so "uproar" is the correct answer. None of the other answer choices are close in meaning to "tumult": "ratification" is the approval of a suggested law; a "prodigy" is a young person with unexpectedly developed skills in some field; a "geologist" is a person who studies the matter that makes up Earth; and a "disclaimer" is a statement that says that someone or a group refuses to be responsible for something.

"Zest" means great passion or enthusiasm, so "enthusiasm" is the correct answer. None of the other answer choices are close in meaning to "zest": "collection" is a group of similar things that people keep; a "plague" is a widespread and contagious disease; "military" refers to a country's army or armed forces; and "communication" means the transmission of information.

A "deadlock" is a stalemate or a situation in which neither side in an argument, battle, or game can make progress, so "stalemate" is the correct answer. None of the other answer choices is close in meaning to "deadlock": a "subsidy" is money given to a company so that prices can remain low; a "discount" is a reduction of an item's price; an "obsession" means the state of being fully absorbed with or nearly constantly thinking about a person or thing; and "sovereign," when used as a noun, means ruler or leader.

A "system" is a set of formulas and procedures, so the answer choice closest in meaning to "system" is "method," a noun meaning procedure or techniques. Considering the other choices, "disorganization" is a noun and the antonym of "system"; it means a lack of organization. "Unit" is a noun meaning a single thing or person or a quantity by which something is measured, and "work" is noun meaning productive activity.

"Wealth" is a noun that means a large amount of money, or when referring to other things, plenty. That means that the answer choice closest in meaning to "wealth" is "abundance," which is a noun meaning a large quantity of something. Considering the other answer choices, none are close in meaning to "wealth": a "need" is a necessity, a "lack" is the absence of something; and a "portion" is a piece of a greater whole.

To have "flair" is to be suave and to have "style." The other incorrect answer choices mean the following: "outspokenness" is to be outgoing; "inventiveness" is creativity; and "gruffness" is having a harsh exterior.

An "omission" is a removal of something; for instance, omitting text from a paper means taking out those words. That means that "removal" is the correct answer. As for the other answer choices, none are close in meaning to "omission": "omniscient" means all-knowing; "revival" means the act of coming back to conscious life or a comeback in popularity; and "retention" means the act of keeping something in a given place.

"Morale" means self-confidence or self-esteem, so "confidence" is the correct answer. None of the other answer choices are close in meaning to "morale": "fortification" means a structure like a wall or building built for defensive purposes; "intuition" means an internal sense of something that one has without being informed about it; "approval" means acceptance or endorsement, and "support," when used as a noun, means publicly conveyed approval or something that is integral to the stability of something else.

An "analogy" can be a type of comparison drawn between two different things, often expressed in a proportion. For instance: "As the eye sees so does the ear hear." These are based upon a certain similarity. For example, the eye and the ear each have their own ways of sensing things—or at least that is implied in the analogy. Therefore, we can also speak of an "analogy" as being a type of similarity. For instance, you could say, "They eye has a certain analogy to the ear, in that they both are used in sensing." (Of course, there are more poetic uses of analogy than this.) The best option is "similarity." Do not be fooled into thinking "equivalence" is correct, for an analogy is precisely something that is not strictly equivalent.