honestly vs frankly

honestly and frankly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
honestly	No	No	No	Yes
frankly	No	No	No	Yes

As adverbs, honestly and frankly are synonyms defined as:

honestly and frankly: (used as intensives reflecting the speaker's attitude) it is sincerely the case that

Other synonyms of honestly include candidly.

honestly (adverb)	frankly (adverb)
(used as intensives reflecting the speaker's attitude) it is sincerely the case that	(used as intensives reflecting the speaker's attitude) it is sincerely the case that
in an honest manner