"Nostalgic" and "sentimental" both indicate a feeling of tenderness, longing, or sweet sadness, often for bygone eras. "Scrawny" means thin and undernourished, and "juvenile" means young or immature. "Amiable" and "friendly" are synonyms.

"Steadfast," "loyal," and "faithful" all mean committed to a person or cause in an unwavering manner. "Faithless" is an antonym of this concept. "Heavy" and "light" are antonyms, as are "lucky" and "unlucky."

"Noble" and "virtuous" both describe someone who is highly ethical and morally upstanding. "Gruesome" means grisly or frightful, and "worried" means concerned or nervous. "Abnormal" means unusual or strange. "Nutty" can mean either peculiar or tasting like nuts, depending on whether it describes a person or a food.

"Wistful" and "nostalgic" are synonyms. "Inappropriate" and "appropriate" are antonyms, as are "luckless" and "lucky." "Toothsome" means tasty or mouthwateringly appetizing. "Defeated" is the opposite of triumphant.

While "sympathetic" and "empathetic" refer to slightly different traits, both concern the ability to understand or feel another person's emotions. "Intellectual" refers to the intellect or intelligence. "Defeated" and "victorious" are antonyms. "Unemotional" and "emotional" are also antonyms. "Crude" means simple, unrefined, or primitive.

"Impertinent" means rude or insolent.

"Distraught" means upset, frantic or emotionally troubled.

"Friendly" means kind, sympathetic or acting as a friend does.

"Lecherous" means lustful, lewd, or crude in a sexual manner.

"Humble" means unpretentious, or meek and mild.

"Coquettish" means "flirtatious" or teasing in a friendly manner.

"Repentant" means feeling sorry or remorseful.

"Persnickety" means uptight, fussy or particular. 

"Churlish" means rude, crude or uncivilized.

"Crude" means vulgar, coarse or lewd.

"Unruly" and "rebellious" similarly mean going against the rules. The other choices are closely related in meaning to each other, each referring to rule abiding (whether societal or moral), but are opposite in meaning to "unruly."

"Choleric" and "ill-tempered" are synonymous adjectives describing someone's anger or irritability. "Perturbed" and "disturbed" are closely related but do not have meanings which are well aligned with the word "choleric." The other answer choices are not synonyms of "choleric" either.

"Praiseworthy" and "commendable" are synonyms. "Vile" means foul or disgusting. "Immense" means huge or massive. "Supreme" means of the highest rank and is not quite a synonym for "praiseworthy," although something "supreme" may also be deserving of praise. "Trustworthy" means able to be trusted.