English Synonyms and Vocabulary

Nasty means very dirty, filthy, offensive in taste or smell; nauseating. Thus, option 3.
 

Relic means an object, custom, etc. that has survived, wholly or partially, from the past; or something that has historic interest because of its age and associations with the past. Thus, option 4.
 

Sanctioin means the act of a recognized authority confirming or ratifying an action; support; encouragement; approval. Thus, option 1.

Futile means something that could not succeed; useless; vain; lacking vigor or purpose; inept or ineffective. Its antonym is 'fertile'. Synonym is 'useless'.
 

Surge means large mass of or as of moving water; wave; swell. Soar means to fly, sail, or glide along high in the air. Both seem to be synonyms.
 

Catapult is an ancient military contrivance for throwing or shooting stones, spears, etc. It is also a type of launcher that provides the force to hurl an airplane, missile, etc. from a deck or ramp to provide an initial high speed. Considering this, option 2 seems to be the right choice.

Halo means a ring of light that seems to encircle the sun, moon, or other luminous body. Option 1 seems to be the perfect synonym.

Clamorous means loud and confused; noisy.
 

Connived means to pretend not to see or look (at something wrong or evil), thus giving tacit consent or cooperation; feign ignorance of another's wrongdoing. Conspire means to plan and act together secretly, esp. in order to commit a crime. Thus, option 4.

Undermine means to wear away and weaken the supports of something. Degrade means to lower in rank or status.
 

Reminiscence means the act of remembering or recollecting past experiences. Thus, option 1.
 

Servile relates to characteristic of a slave; humbly yielding or submissive.
 

Plunge means to thrust, throw, or force suddenly (into a liquid, hole, condition, etc). Thus, option 1.

Abet means to incite, sanction, or help, esp. in wrongdoing. Support means to give courage, faith, or confidence to somebody. Thus, they are similar in tone.

Catastrophe means any great and sudden calamity, disaster, or misfortune. Thus, option 2.
 

Benevolent means doing or inclined to do good; kindly; charitable. Thus, option 3.
 

Bewilder means to confuse hopelessly, as by something complicated or involved; befuddle; puzzle. All of the above options have the same meaning.
 

Albeit means although; even though.
 

Renounce means to give up (a claim, right, belief, etc.), usually by a formal public statement. Forsake means to give up; renounce (a habit, idea, etc.).

Porridge means a soft food made of cereal or meal boiled in water or milk until thick. Dessert means a usually sweet course, as of pie, cake, or ice cream, served at the end of a meal.

Colossal means astonishingly great; extraordinary. Thus, option 1.

Underpriviledged means poor, indigent, disadvantaged, deprived, unfortunate, impoverished, needy. Hence, option 3.

Portent means meaningful, notable, vital. Thus, option 4.

Debacle means downfall, collapse, fiasco, rout. Thus, option 2.

Blasphemous means  irreverent, profane, irreligious. Thus, option 1.

Fued means  quarrel, strife, vendetta. Hostility means  enmity, hatred, abhorrence, aversion. Thus, option 3.