calm vs lull

calm and lull both are nouns.

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

As verbs, calm and lull are synonyms defined as:

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

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

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

calm (noun)	lull (noun)
steadiness of mind under stress	a period of calm weather
wind moving at less than 1 knot; 0 on the Beaufort scale	a pause during which things are calm or activities are diminished

calm (adjective)	lull (adjective)
(of weather) free from storm or wind
not agitated; without losing self-possession

calm (verb)	lull (verb)
cause to be calm or quiet as by administering a sedative to	become quiet or less intensive
make steady	make calm or still
make calm or still	calm by deception
become quiet or calm, especially after a state of agitation