Looks as though anthem is supposed to have lyrics:

   1. A hymn of praise or loyalty.
   2. A choral composition having a sacred or moralizing text in English.
   3. A modern ballad accompanied by rock music instrumentation.


[Middle English anteme, from Old English antefn, from Late Latin antiphna, from Late Greek, from neuter pl. of antiphnos, sounding in answer : anti-, in return; see anti- + phn, voice; see bh-2 in Indo-European Roots.]