Synonyms(NB: words following * are antonyms)I

1. relic, remnant, historical object, artifact, leftover, remains
2. expedition, journey, outing, trip, voyage, mission, tour/ team, group
3. vicious, cruel, nasty, brutal, ferocious, fierce, inhuman, violent, sadistic
4. aplomb, self- confidence, self- possession, assurance, composure, ease, style, cool* awkwardness
5. mustache, facial hair, beard, whiskers, fuzz
6. anxiety, angst, worry, apprehension, fretfulness
7. syllogism
8. monstrous, hideous, grotesque, gruesome, ugly, horrible, atrocious, outrageous * lovely
9. pleasant, enjoyable, agreeable, pleasing, amusing * unpleasant
10. mop of hair
11. hair, locks, tresses, curls, mane/ coat, fur, wool, pelt
12. bitterness, resentment, acrimony, unpleasantness, sullenness, anger, animosity, hostility, sourness * sweetness
13. sourness, acidity, tartness, tang, bitterness * sweetness
14. laughing-stock, fool, clown, butt of all jokes, bumpkin
15. advisability, wisdom, prudence, sense, desirability, suitability * foolishness
16. routine, custom, habit, schedule, practice, usual, regular, everyday, habitual
17. mutual, joint, shared, common, reciprocated, reciprocal
18. conjunction, combination, coincidence, concurrence, juxtaposition, union
19. insosuit ( Asimov seems to have coined this portmanteu word from ‘ insular/ insulated’ and ‘suit’ . Therefore, an insular covering or suit)
20. glint, sparkle, flash, wink, shine, twinkle
21. glint of sudden hope
22. straddle, be on both sides of, overlap, span, include, bestride
23. crummy, cheap, worthless, tacky, tasteless, shabby, rubbishy, poor quality, shoddy
24. diaphragm
25. laborious, arduous, difficult, backbreaking, painstaking, protracted, lengthy * easy
26. succinctly, in a few words, briefly, concisely, pithily, tersely
27. mutter, murmur, speak softly, mumble, whisper
28. puckered, wrinkled, creased, furrowed* smooth
29. consideration, thought, deliberation, reflection, contemplation/ thoughtfulness, kindness, concern
30. indicate, point to, point out, point toward, designate, specify, show, be a sign of, signify
31. rumble, roar, thunder, crash, growl, grumble