arrant trifling
arrested development
arrogant imposition
artful adaptation
artificial suavity
artistic elegance
artless candor
ascending supremacy
ascetic devotion
ascribed productiveness
aspiring genius
assembled arguments
asserted activity
assiduously cultivated
assimilative power
assumed humiliation
assuredly enshrined
astonishing facility
astounding mistakes
astute observer
athletic prowess
atmospheric vagueness
atoning sacrifice
atrocious expression
atrophied view
attending circumstances
attentive deference
attenuated sound
attested loyalty
attractive exordium [exordium = introduction of a speech or treatise]
audacious mendicant [mendicant = depending on alms; beggar]
audible intimations
augmented force
august tribunal
auspicious moment
austere charm
authentic indications
authoritative critic
autobiographical pages
autocratic power
automatic termination
autumnal skies
auxiliary aids
available data
avaricious eyes
avenging fate
average excellence
averted calamity
avowed intention
awakened curiosity