Other hyponyms of speaker include
alliterator,
caller,
phoner,
telephoner,
babbler,
chatterbox,
chatterer,
magpie,
prater,
spouter,
conversationalist,
conversationist,
schmoozer,
dictator,
drawler,
driveller,
jabberer,
ejaculator,
growler,
asker,
enquirer,
inquirer,
querier,
questioner,
lecturer,
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.