Acumen, maybe? Acumen is more a description of natural ability, though, rather than a synonym for erudition (which is the accumulation of knowledge chiefly from books).
Acumen is synonymous with discernment, according to Merriam-Webster's online dictionary: "a power to see what is not evident to the average mind"
acquaintance
apprehension
acroama
awareness
apperception
assimilation
appreciation
Afraid is a synonym for scared. It begins with the letter a.
Learning
Another word for an educated guess is "hypothesis." A hypothesis is a proposed explanation or prediction based on prior knowledge and evidence, often used as a starting point for further investigation or experimentation. It is grounded in existing information but still involves an element of uncertainty.
Satanic
Particle
Finish is another word for completion starting with the letter F.
Liberalness is another word for generosity starting with the letter L.
recover
another archive
used
unclean :)
The word can be: Trailer or trolley.
littlest
textile
retreat
Frail.
liege