Lyrics go in W: lines - easiest to do upper case "W:" and you can put them all in a block under the tune, but if you use lower case "w:" you can put the words under the stave; however this requires a lot of careful notation with dashes, underscores etc. + trial and error to make the words fit the notes properly.

N: lines don't usually show in print from ABC and intended for any comments about the tune/song not covered by C: O: Z: etc.

Anahata