apprehensive and anxious
appropriate and eloquent
approve and admire
apt and novel
archness and vivacity [archness = inappropriate playfulness]
ardent and aspiring
argument and inference
arid and unprofitable
arrangement and combination
arrogant and overbearing
artificial and elaborate
artistic and literary
artlessness and urbanity
ashamed and speechless
aspects and phases
aspiring and triumphal
assiduity and success
assimilated and combined
assuaged and pacified
astonished and curious
astound and perplex
athletic and nimble
atonement and forgiveness
atrocious and abominable
attacks and intrigues
attention and respect
attitudes and expressions
attractiveness and ability
audacity and skill
august and splendid
austere and icy
available and capable
avarice and cruelty
avidity and earnestness [avidity = desire; craving]
awake and active
awe and reverence
awkwardness and crudity
B
babel and confusion
backbone and sinew
baffled and disappointed
balanced and forceful
barbarity and wickedness
bards and sages
base and unworthy
beam and blaze
bearing and address
beautiful and majestic
bedraggled and disappointed