Non-standard speech and Oral communication

Non-standard speech noun - Speech that differs from the usual accepted, easily recognizable speech of native adult members of a speech community.

Oral communication and non-standard speech are semantically related. In some cases you can use "Oral communication" instead a noun phrase "Non-standard speech".

Oral communication noun - (language) communication by word of mouth.

Non-standard speech and oral communication are semantically related. Sometimes you can replace phrase "Non-standard speech" with "Oral communication", this phrases are similar.