peal vs knell

peal and knell both are nouns.

Word	Noun	Adjective	Verb	Adverb
peal	Yes	No	Yes	No
knell	Yes	No	Yes	No

As verbs, knell is a hyponym of peal; that is, knell is a word with a more specific, narrower meaning than peal:

Other hyponyms of peal include ding, dingdong, dong, tintinnabulate, peal.

peal (noun)	knell (noun)
a deep prolonged sound (as of thunder or large bells)	the sound of a bell rung slowly to announce a death or a funeral or the end of something

peal (verb)	knell (verb)
ring recurrently	ring as in announcing death
sound loudly and sonorously	make (bells) ring, often for the purposes of musical edification