Comma and Full stop

Comma noun - A punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence.

Full stop and comma are semantically related. In some cases you can use "Full stop" instead a noun "Comma".

Full stop noun - A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations.

Comma and full stop are semantically related. Sometimes you can use "Comma" instead a noun phrase "Full stop".