lexical pointers
derivationally related form
semantic pointers
hypernym
hyponym
alarmist
allegorizer, allegoriser
announcer
articulator
asserter, declarer, affirmer, asseverator, avower
avower
broadcaster
conferee
conferrer
confessor
correspondent, letter writer
gossip, gossiper, gossipmonger, rumormonger, rumourmonger, newsmonger
hisser
source, informant
laudator, lauder, extoller
negotiator, negotiant, treater
persuader, inducer
popularizer, populariser, vulgarizer, vulgariser
presenter
promisee
promiser, promisor
propagandist
propagator, disseminator
publicist, publicizer, publiciser
quoter
rambler
reporter, newsman, newsperson
respondent, responder, answerer
roarer, bawler, bellower, screamer, screecher, shouter, yeller
sender, transmitter
signaler, signaller
signer
swearer
sympathizer, sympathiser, comforter
telepathist, thought-reader, mental telepathist, mind reader
twaddler
waffler
warner
waver
wirer
author, writer