Asker and Utterer

Asker noun - Someone who asks a question.

Utterer and asker are semantically related. In some cases you can use "Utterer" instead a noun "Asker".

Utterer noun - Someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous).

Asker and utterer are semantically related. Sometimes you can replace term "Asker" with "Utterer", this nouns are similar.