lamenter vs griever

lamenter and griever both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamenter	Yes	No	No	No
griever	Yes	No	No	No

As nouns, lamenter and griever are synonyms defined as:

lamenter and griever: a person who is feeling grief (as grieving over someone who has died)

Other synonyms of lamenter include mourner, sorrower.

lamenter (noun)	griever (noun)
a person who is feeling grief (as grieving over someone who has died)	a person who is feeling grief (as grieving over someone who has died)