sorrow vs lament

sorrow and lament both are nouns.

Word	Noun	Adjective	Verb	Adverb
sorrow	Yes	No	Yes	No
lament	Yes	No	Yes	No

sorrow (noun)	lament (noun)
something that causes great unhappiness	a mournful poem; a lament for the dead
an emotion of great sadness associated with loss or bereavement	a song or hymn of mourning composed or performed as a memorial to a dead person
sadness associated with some wrong done or some disappointment	a cry of sorrow and grief
the state of being sad

sorrow (verb)	lament (verb)
feel grief	regret strongly
	express grief verbally