ABCs and Substratum

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

Substratum and ABCs are semantically related. in basis topic. In some cases you can use "Substratum" instead a noun "ABCs", when it comes to topics like basis for something physical or mental.

Substratum noun - Any stratum or layer lying underneath another.

ABCs and substratum are semantically related. Sometimes you can use "ABCs" instead a noun "Substratum".

Nearby Word: substrate