"Oceanic" and "aquatic" are both adjectives referring to taking place in the water or ocean. To follow the analogy, the correct answer should also be an adjective similar in meaning to extensive. "Extensive" means reaching out far. Prefix "ex" = out, root "tens" line.

"Pervasive" (adj), meaning spread throughout, is the correct answer. Prefix "per" = through, root "vas" go.

"Exclusive" (adj) means pertaining to a limited area. Prefix "ex" = out, root "clus" = shut. This is an antonym, not a synonym.

"Finite" (adj) having limits. It is also an antonym of extensive.

"Hefty" (adj) does mean large, but has a connotation that refers to mass.

"Extrovert" (noun) is someone who is outgoing and sociable and who gains energy from social interaction.  Prefix "extro" = outside, beyond, root "vert" turn/change. This could be synonymous if the word were an adjective.

"Ebb" and "recede" are synonyms, both words mean go out, move away from. So, to solve this analogy you have to determine which of these is a synonym of "ordain." To "ordain" is to make holy, to make sacred, or to "sanctify." Additionally, "quibble" means complain about something minor, argue about something petty; "rescind" means withdraw, take back; "gratify" means please, give pleasure and satisfaction to; "ventilate" means allow air to circulate, 'air out.'

To begin with "renounce" and "abdicate" are both loosely synonyms of one another. They both mean to give something up, to abandon something. Although usually "renounce" means to give up, to abandon an idea and "abdicate" means to give up on and abandon power. So, to solve this problem you need to determine which of these answers has the same meaning as "burden." The correct answer is "encumber" which means burden with, weigh down with. Additionally, "disburse" means spend, pay for; "sequester" means isolate, lock-away; "allot" means assign to, give to; "forge" means either make, create or falsify, make up, lie about.

"Confine" and "imprison" both mean to lock up, they are synonyms of one another. So, to solve this analogy you need to figure out which of these answers is a synonym of "liberate" which means set free, make free. The correct answer is "extricate" which means free someone from a constraint. Additionally, "permit" means allow to happen; "digress" means stray, move away from the main point; "apprehend" means catch and arrest; "induce" means cause to happen, make happen.

A "decree" is the same thing as an "order." To solve this analogy, you need to determine which of the answer choices is a synonym of "deadlock." "Deadlock" refers to a situation in which two sides cannot make any progress. Another word for this is an "impasse." A "muse" is an inspiration for a work of art, and to "muse" about something is to think deeply about it. A "courier" is a messenger, and a "rendition" is a performance of something. 

An "egress" is an exit, so to solve this problem you need to determine which of these answer choices means "starving" (hungry, needing food). The correct answer is "ravenous" which means starving hungry. Additionally, "dispassionate" means calm, under control, not passionate; "doomed" means destined to fail, likely to suffer; "glib" means (of conversation) insincere and terse; "impecunious" means penniless, having no money, 'broke.'

"Zealotry" and "fanaticism" are synonyms, both words relate to an intense and fanatical devotion to an idea, a group, or an ideology. So, to solve this analogy you need to determine which of these words is a synonym of "idolatry." "Idolatry" is the worship of idols, or the worship of images deemed inappropriate by a certain religion. This is closest in meaning to "veneration" which means the worship of something. Additionally, "candor" means honesty and frankness; "aspiration" is a desire to achieve something, a hope to accomplish some goal; "duplicity" is deceitfulness (particularly saying one thing to one person and one thing to another person); "enmity" is hostility, a state of prolonged conflict and tension.

"Pious" and "devout" are synonyms of one another, both words mean deeply religious. So, to solve this analogy you need to determine which of these words means something like "tireless." The correct answer is "indefatigable" which means not able to be tired or fatigued by, tireless. Additionally, "quiescent" means at rest; "doleful" means sad, morose; "resilient" means able to suffer setbacks and then bounce back; "imbued" means filled with. 

"Perfunctory" means cursory, undertaken with little consideration, casual and "superficial." "Perfunctory" and "superficial" are synonyms of one another, so to solve this analogy you need to determine which of these is a synonym of "perfidy." The correct answer is "treachery" because "perfidy" means lack of trustworthiness, duplicity, betrayal. Additionally, "exigency" is urgency; "pomposity" is the characteristic of being self-important and arrogant; "stationary" means not moving, 'in one place'; an "atrocity" is a terrible act committed against a group.

To begin with "lopsided" means crooked, uneven, out of line, not symmetrical. It is therefore a synonym of "asymmetrical." So, to solve this analogy you need to determine which of these answer choices is a synonym of "obstinate" (which means stubborn). The correct answer is "hidebound" which means stubborn, refusing to change one's mind. Additionally, "frivolous" means flippant, not having any usefulness, pointless and glib; "juvenile" means childish, immature; "caustic" means sarcastic and scathing; "phenomenal" means fantastic, extraordinary, sublime, incredible.