questioner (n.)
- asker
- busybody
- catechist
- cross-questioner
- detective
- eavesdropper
- examiner
- gossip
- inquirer
- inquisitor
- interlocutor
- interrogator
- interviewer
- pollster
- pry
- querier
- quidnunc
- quizzer
- rubberneck
- rubbernecker
- sampler
- sightseer
- snoop
- snooper
- voyeur
- yenta