lament vs requiem

lament and requiem both are nouns.

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

As nouns, lament and requiem are synonyms defined as:

lament and requiem: a song or hymn of mourning composed or performed as a memorial to a dead person

Other synonyms of lament include coronach, dirge, threnody.

lament (noun)	requiem (noun)
a mournful poem; a lament for the dead	a song or hymn of mourning composed or performed as a memorial to a dead person
a song or hymn of mourning composed or performed as a memorial to a dead person
a cry of sorrow and grief

lament (verb)	requiem (verb)
regret strongly
express grief verbally