signaler vs bell ringer

signaler and bell ringer both are nouns.

Word	Noun	Adjective	Verb	Adverb
signaler	Yes	No	No	No
bell ringer	Yes	No	No	No

As nouns, bell ringer is a hyponym of signaler; that is, bell ringer is a word with a more specific, narrower meaning than signaler:

signaler: someone who communicates by signals
bell ringer: a person who rings church bells (as for summoning the congregation)

Other hyponyms of signaler include signalman, ringer, toller, whistler.

signaler (noun)	bell ringer (noun)
someone who communicates by signals	something that exactly succeeds in achieving its goal
	someone who plays musical handbells
	a person who rings church bells (as for summoning the congregation)