How you call a song that you want to find just the words in the song not the lyrics just the person saying the works without the music in the back ground like when you want just the music its called the name insturmintal but what's the one for just the words

A poem?

No poem does not work

A Sonnet?

Lyrics are the words to a song. Performer, singer, band, group is/are the person(s) doing the singing in a song. Then again, are you asking about the person who wrote the words?lyracist or song writer.

Could it be A capella (http://en.wikipedia.org/wiki/A_cappella)?

J_9, glad you could make sense of the question better than I. Your answer sounds about right to me!