betrothal vs ringing

betrothal and ringing both are nouns.

Word	Noun	Adjective	Verb	Adverb
betrothal	Yes	No	No	No
ringing	Yes	No	No	No

As nouns, ringing is a hyponym of betrothal; that is, ringing is a word with a more specific, narrower meaning than betrothal:

betrothal (noun)	ringing (noun)
the act of becoming betrothed or engaged	having the character of a loud deep sound; the quality of being resonant
a mutual promise to marry	the giving of a ring as a token of engagement
	the sound of a bell ringing