Words

acrostic

acrostic

(əˈkrɒstɪkPronunciation for acrostic)
  noun
   
  a a number of lines of writing, such as a poem, certain letters of which form a word, proverb, etc. A single acrostic is formed by the initial letters of the lines, a double acrostic by the initial and final letters, and a triple acrostic by the initial, middle, and final letters
  b the word, proverb, etc, so formed
  c (as modifier) ■ an acrostic sonnet
  [C16: via French from Greek akrostikhis, from acro- + stikhos line of verse, stich]

aˈcrostically
adverb

acrostical

acrostical

(əˈkrɒstɪkəl)
  adjective
    relating to an acrostic