As nouns the difference between questioner and requester
is that questioner is a person who asks questions, or who conducts an official enquiry while requester is one who, or that which, makes a request.
questioner
English
Noun
(
en noun)
A person who asks questions, or who conducts an official enquiry
Synonyms
*inquirer
*inquisitor
*interrogator
requester
English
Noun
(
en noun)
One who, or that which, makes a request.
Coordinate terms
* requestress