Cases of word usage

1) the repetition of the first sound or letter in a succession of words, e.g. safe and sound; through thick and thin (alliteration)

2) the first letter (A) in the Greek alphabet (alpha)

3) something said or written after a question, request, a letter asking for something etc (answer)

4) a person who brings a letter or message (bearer)

5) (a letter or phonetic symbol representing) a speech sound produced by a complete or partial stoppage of the breath (consonant)

6) something that covers; a covering letter ( = one sent with a document or with goods etc) (covering)

7) the Greek letter D; land in this shape at the place where some rivers meet the sea and separate to make two or more branches (delta)

8) small round mark (as over the letter i and j) (dot)

9) a paper covering for a letter etc (envelope)

10) a letter in the New Testament, written by an apostle (epistle)