Other hyponyms of utterer include
alliterator,
caller-up,
caller,
phoner,
telephoner,
babbler,
chatterbox,
chatterer,
magpie,
prater,
spouter,
conversationalist,
conversationist,
schmoozer,
dictator,
drawler,
driveller,
jabberer,
ejaculator,
growler,
asker,
enquirer,
inquirer,
querier,
questioner,
lisper,
mentioner,
motormouth,
mumbler,
murmurer,
mutterer,
narrator,
storyteller,
teller,
orator,
public speaker,
rhetorician,
speechifier,
speechmaker,
prattler,
ranter,
raver,
reciter,
native speaker,
stammerer,
stutterer,
stentor,
talking head,
venter,
vociferator,
voicer,
wailer,
whisperer,
informant,
witness,
witnesser.