Cordially vs Regards - What's the difference?

As an adverb cordially

is in a cordial, warm or friendly manner.

plural of lang=en.

third-person singular of regard.

(en adverb)

In a cordial, warm or friendly manner.

* 1893 , London, Royal Geographical Society, The Geographical Journal

I may ask you, then, cordially to thank Sir George Goldie for all that he has done for the Society.

* 1898 , Ivan Sergeevich Turgenev, Tourguéneff and his French Circle

My dear Monsieur Durand,—I am sending you[....]

Ever most cordially yours,

*:: Iv. Tourguéneff.

As indicated above, the term is often used in letter closings.

(head) (p)

(pluralonly) A greeting to pass on to another person.

Give my regards to your brother when you next see him.

(pluralonly) A greeting at the end of a letter or e-mail communication.

regards''', John.'' ''Kind '''regards , Peter.

(head)

(regard)