(law) power of attorney

plural of letter warrant

(poetry) The repeated letter or letter sequence in alliteration.

plural of rhyme letter

Synonym of letters rogatory

(law) A formal request from a court to a foreign court for some type of judicial assistance.

A book in which letters (written correspondence) or copies of letters are kept.

plural of letterbook

plural of bye-letter

(UK, historical) A postal letter carried only part of the way to the central post office, and delivered to its destination along the way.