adviser
announcer
annunciator
authority
channel
communicant
communicator
expert witness
gossipmonger
grapevine
informant
information center
information medium
informer
interviewee
monitor
mouthpiece
newsmonger
notifier
press
public relations officer
publisher
radio
reporter
source
spokesman
television
teller
tipster
tout
witness
acupuncturist
anecdotage
bear garden
best-hearted
breaking-up
caregivers
civilizer
coöperate
defenselessness
dietician
ennoblement
independent-minded
inspirer
instructress
intermeddler
newswire
proposer
quickener
seconder
stipendiary
telemarketer
upliftment
voyageurs
wrecker