"Perfect" is an adjective that means as good as possible or lacking any imperfections. So, the answer choice closest in meaning to "perfect" is "ideal," an adjective that means most suitable or perfect. None of the other answers are close in meaning to "perfect": "messy" means dirty; "restless" means unable to relax; and "functional" means existing for a specific purpose.

“Ghastly” means horrific, horrible, and abhorrent. To provide further help, “mangle” means to crush or twist out of shape; “surprising” means not expected; “iconic” means characterize by fame and admiration; “whimsical” means quirky and silly.

The prefix "extra-" means beyond or greater than, so “extraordinary” means beyond ordinary or incredible, so "incredible" is the correct answer. None of the other answer choices are close in meaning to "extraordinary": “insignificant” means not significant or not important; “deplorable” means deserving of hatred; “laudable” means worthy of praise; and “susceptible” means vulnerable to something specific.

We all know the word "superb" because of its association with "super." Something is called "super" when it is a great specimen of that type. A "super hot room" is a room that is very hot. When something is "superb," it is excellent—very able to be praised. While it might be "good" or "acceptable," it is best to choose an answer that expresses the very good character of something that is superb. Likewise, something superb is likely to be suprising (because of how good it is). Still, to be "superb" primarily means to be "excellent" or "very good." Therefore, "excellent" is the best option.

"Makeshift" is defined as serving as a temporary substitute; acceptable for the time being.

"Lavish" is an adjective that means "sumptuously rich, elaborate, or luxurious," "very generous or extravagant" when used of a person, or "spent or given in profusion." So, neither "sparing" nor "cheap" can be the correct answer because each of these words are antonyms of "lavish," not synonyms. "Luxurious," however, means "extremely comfortable, elegant, or enjoyable, especially in a way that involves great expense," or "giving self-indulgent or sensuous pleasure." So, because it is the answer choice closest in meaning to "lavish," "luxurious" is the correct answer.

"Costly" is an adjective that means either "costing a lot; expensive" or "causing suffering, loss, or disadvantage," so we need to pick out an adjective that means something like "costing a lot" or "causing suffering." "Cheap" cannot be the correct answer, then, because "cheap" is an antonym, not a synonym, of "costly." Since "pricey" is an adjective that informally means "expensive," "pricey" is the answer choice closest in meaning to "costly," making "pricey" is the correct answer.

"Marvelous" is an adjective that means either "causing great wonder; extraordinary" or "extremely good or pleasing; splendid." So, we need to pick out an adjective that means something like "extraordinary" or "splendid." "Mundane," then, cannot be the correct answer, because "mundane" means "lacking interest or excitement; dull," making it an antonym, not a synonym, of "marvelous." "Phenomenal," however, is an adjective that means " very remarkable; extraordinary," and because "phenomenal" is the answer choice closest in meaning to "marvelous," "phenomenal" is the correct answer.

“Lucrative” is an adjective that means “producing profit,” so we need to pick out an answer choice that means something like “producing profit.” That means that “unprofitable” cannot be the correct answer, because “unprofitable” can mean “not yielding profit” when referring to a business or activity, making it an antonym, not a synonym, of “lucrative.” “Profitable,” however, is an adjective that means “yielding profit” when referring to a business or activity, and because “profitable” is the answer choice closest in meaning to “lucrative,” “profitable” is the correct answer.

"Expensive" means costly.