1:
abate 
subside; decrease; become less in amount or intensity
2:
aberrant 
abnormal; markedly different from an accepted norm
3:
abeyance 
suspended action; temporary cessation or suspension
4:
abhor 
fill with horror and loathing; horrify; hate
5:
abolish 
cancel; put an end to; destroy completely
6:
abominable 
detestable; extremely unpleasant; very bad
7:
aboriginal 
being the first of its kind in a region; primitive; native
8:
abortive 
unsuccessful; failing to accomplish an intended objective; fruitless
9:
abrasive 
rubbing away; tending to grind down
10:
abstain 
refrain; hold oneself back voluntarily from an action or practice
11:
abstruse 
obscure; profound; difficult to understand.
12:
abundant 
plentiful; possessing riches or resources
13:
abut 
border upon; adjoin; touch or end at one end or side; lie adjacent
14:
abysmal 
bottomless; very profound; limitless; very bad
15:
accede 
agree; give consent, often at insistence of another; concede
16:
accentuate 
emphasize; stress; pronounce with a stress or accent; mark with an accent
17:
acclaim 
applaud; announce with great approval
18:
accrue 
increase, accumulate, or come about as a result of growth; accumulate over time
19:
acoustics 
science of sound; quality that makes a room easy or hard to hear in
20:
acquiesce 
assent; agree without protesting
21:
acrid 
unpleasantly sharp or bitter to taste or smell; bitterly pungent
22:
acumen 
mental keenness; quickness of perception
23:
addendum 
something added or to be added, especially a supplement to a book
24:
adherent 
person who adheres; one who follows or upholds a leader, party, cause
25:
admonish 
warn; counsel someone against something to be avoided
26:
adorn 
enhance or decorate with or as if with ornaments
27:
adroit 
skillful and adept under pressing conditions
28:
advent 
coming or arrival, especially of something extremely important
29:
advocacy 
support; active pleading on behalf of something
30:
affable 
easily approachable; warmly friendly
31:
affinity 
natural attraction, liking, or feeling of kinship; relationship by marriage
32:
affirmation 
positive assertion; confirmation; solemn pledge by one who refuses to take an oath
33:
affront 
insult; offense; intentional act of disrespect
34:
aggregate 
gather into a mass, sum, or whole; amount to
35:
aghast 
struck by shock, terror, or amazement
36:
agility 
mentally quick; moving quickly and lightly
37:
agitate 
cause to move with violence or sudden force; upset; disturb
38:
agitation 
anxiety; extreme emotional disturbance
39:
agrarian 
pertaining to land or its cultivation; relating to agricultural or rural matters
40:
alchemy 
medieval chemistry; magical or mysterious power or process of transforming