Punctuation mark and Question mark

Punctuation mark noun - The marks used to clarify meaning by indicating separation of words into sentences and clauses and phrases.

Question mark and punctuation mark are semantically related. In some cases you can replace phrase "Question mark" with "Punctuation mark", this phrases are similar.

Question mark noun - A punctuation mark (?) placed at the end of a sentence to indicate a question.

Punctuation mark and question mark are semantically related. Sometimes you can use "Punctuation mark" instead a noun phrase "Question mark".