quieten vs lull

quieten is not a noun while lull is a noun.

Word	Noun	Adjective	Verb	Adverb
quieten	No	No	Yes	No
lull	Yes	No	Yes	No

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

Other hyponyms of quieten include shush, calm down, shout down, gag, muzzle.

As verbs, quieten and lull are synonyms defined as:

Other synonyms of quieten include calm, calm down, quiet, still, tranquilize, tranquillise, tranquillize.

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

Other hyponyms of quieten include compose, appease, assuage, conciliate, gentle, gruntle, lenify, mollify, pacify, placate.

quieten (noun)	lull (noun)
	a period of calm weather
	a pause during which things are calm or activities are diminished

quieten (verb)	lull (verb)
cause to be quiet or not talk	become quiet or less intensive
make calm or still	make calm or still
become quiet or quieter	calm by deception