You searched for: “acrogram
1. The use of all of the letters from a word to form the first letter of each of the words that may be formed from the letters of the first word; for example, using the word “dare” to form four words beginning with “d”, “a”, “r”, and “e”.
2. Using the letters of a word as a basis for forming lines of poetry or lines in a song, etc. by referring to each of the letters of the base word.