Paul Pry
Peeping Tom
asker
busybody
catechist
cross-interrogator
cross-questioner
detective
eavesdropper
examiner
gossip
inquirer
inquisitionist
inquisitive
inquisitor
interlocutor
interpellator
interrogator
interrogatrix
interviewer
nosy Parker
opinion-sampler
poller
pollster
prober
pry
querier
querist
questionist
quidnunc
quizzer
rubberneck
rubbernecker
sampler
scopophiliac
secret agent
sightseer
snoop
snooper
voyeur
yenta
speaker
talker
utterer
verbaliser
verbalizer
canvasser
cross-examiner
headcounter
poll taker
tester
counsellor
doubter
intruder
persecutor
petitioner
rescuer
suitor
tormentor