"M-O-T-H-E-R-(a word that means the world to me) by Eddy Arnold.Unfortunately, I don't remember the lyrics but it's roughly:
         
          M is for the many things she gave me.
          O means only that she's growing old.
          T is for??
          H is for her hair as pure as gold.
          E is for??
          R is right and right she'll always be.
          Put them all together-they spell MOTHER,
          A word that means the world to me.

   Perhaps someone can fill in the missing words.