calmness vs lull

calmness and lull both are nouns.

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

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

Other hyponyms of calmness include stillness, windlessness, quiet.

calmness (noun)	lull (noun)
steadiness of mind under stress	a period of calm weather
a feeling of calm; an absence of agitation or excitement	a pause during which things are calm or activities are diminished
an absence of strong winds or rain

calmness (verb)	lull (verb)
	become quiet or less intensive
	make calm or still
	calm by deception