Learning vs Letters - What's the difference?

Learning is a synonym of letters.

is that learning is while letters is (letter).

is that learning is (uncountable) an act in which something is learned while letters is .

(head)

I'm learning to ride a unicycle.

(en-noun)

(uncountable) An act in which something is learned.

Learning to ride a unicycle sounds exciting.

(uncountable) Accumulated knowledge.

The department head was also a scholar of great learning .

(countable) Something that has been learned

* {{quote-news, year=2007, date=April 5, author=Stuart Elliott, title=Online Experiment for Print Magazine, work=New York Times citation

, passage=“We’ll take the learnings and apply them to the rest of our business.” }}

Countable sense “thing learned” often used in plural form (m); see for details.

* book-learning * higher learning * learning curve * learning disability * learning by doing