Truthfully vs Faithfully - What's the difference?

As adverbs the difference between truthfully and faithfully

is that truthfully is (manner) in a truthful manner while faithfully is in a faithful manner.

(en adverb)

(manner) In a truthful manner

He spoke truthfully .

(speech act) Frankly.

Truthfully , I didn't suspect a thing.

(en adverb)

In a faithful manner.

The CD reproduces music faithfully.

I have been faithfully married for the past twenty years.

(US) A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended using an honorific.

* (formula for ending correspondence) yours faithfully (UK)

* unfaithfully

* yours faithfully