lament vs dirge

lament and dirge both are nouns.

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

As nouns, lament and dirge are synonyms defined as:

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

Other synonyms of lament include coronach, requiem, threnody.

lament (noun)	dirge (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)	dirge (verb)
regret strongly
express grief verbally