lament vs deplore

lament is a noun but deplore is not a noun.

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

As verbs, lament and deplore are synonyms defined as:

Other synonyms of lament include bemoan, bewail.

lament (noun)	deplore (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 cry of sorrow and grief

lament (verb)	deplore (verb)
regret strongly	express strong condemnation of
express grief verbally	regret strongly