\version "2.19.36"
upper = \relative c'' {
  \clef treble
  \key c \major
  \time 4/4
  a4 b c d
  a4 b c d
  a4 b c d
}
lower = \relative c {
  \clef bass
  \key c \major
  \time 4/4
  a2 c
  a2 c
  a2 c
}
text = \lyricmode {
  Aaa Bee Cee Dee
  A word is veryverylongindeed
  a tiny little bit.
}
\score {
  \new GrandStaff <<
    \new Staff = upper { \new Voice = "singer" \upper }
    \new Lyrics \lyricsto "singer" \text
    \new Staff = lower { \lower }
  >>
  \layout {
    \context {
      \GrandStaff
      \accepts "Lyrics"
    }
    \context {
      \Lyrics
      %%\consists "Bar_engraver"
    }
  }
  \midi { }
}