bell ringing vs ringing

bell ringing and ringing both are nouns.

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

As nouns, ringing is a hypernym of bell ringing; that is, ringing is a word with a broader meaning than bell ringing:

Other hypernyms of bell ringing include ring, tintinnabulation.

bell ringing (noun)	ringing (noun)
playing a set of bells that are (usually) hung in a tower	having the character of a loud deep sound; the quality of being resonant
persuasion of voters in a political campaign	the giving of a ring as a token of engagement
the sound of someone playing a set of bells	the sound of a bell ringing