ABCs and Principles

ABCs noun - The elementary stages of any subject (usually plural).

Principles and ABCs are semantically related. in fundamentals topic. In some cases you can use "Principles" instead a noun "ABCs", when it comes to topics like language rules.

Principles noun - General or basic truths on which other truths or theories can be based.

ABCs and principles are semantically related. Sometimes you can use "ABCs" instead a noun "Principles".