frankly vs honestly

frankly and honestly both are adverbs.

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

As adverbs, frankly and honestly are synonyms defined as:

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

Other synonyms of frankly include candidly.

frankly (adverb)	honestly (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