calm down vs lull

calm down is not a noun while lull is a noun.

Word	Noun	Adjective	Verb	Adverb
calm down	No	No	Yes	No
lull	Yes	No	Yes	No

As verbs, calm down and lull are synonyms defined as:

As verbs, calm down and lull are synonyms defined as:

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

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

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

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

calm down (verb)	lull (verb)
become quiet or less intensive	become quiet or less intensive
make calm or still	make calm or still
become quiet or calm, especially after a state of agitation	calm by deception