Hi Carlos,
I do a lot of this sort of thing for my church. I usually use the following format:
\header { }
global { }
chordNames \ chordmode { \global chord, chord, chord, etc.}
melody = \relative c '' { \global music, music, music, etc }
verse = \lyricmode { \set stanza = "1. " words, words, words, etc, chorus }
\score {
<<
\new ChordNames \chordNames
\new Staff { \melody }
\addlyrics { \verse }
\addlyrics { \set stanza = "2. " words, words, words, etc (no chorus) }
\addlyrics { \set stanza = "3. " words, words, words, etc (no chorus) }
>>
Ths words for the chorus only need to be in Verse 1, unless they change each time. Also, because I'm old, I add this after the '\set stanza' at the beginning of each word section:
\override LyricText font-size = 3
That makes it a lot easier for these old eyes to read.
Good luck with your work!
Jerry