nearly vs closely

nearly and closely both are adverbs.

Word	Noun	Adjective	Verb	Adverb
nearly	No	No	No	Yes
closely	No	No	No	Yes

As adverbs, nearly and closely are synonyms defined as:

Other synonyms of nearly include intimately.

nearly (adverb)	closely (adverb)
(of actions or states) slightly short of or not quite accomplished; all but	in a close relation or position in time or space
in a close manner	in a close manner
	in an attentive manner