shanty1
  
  n.
 (pl. shanties)
 a small, crudely built shack.
Etymology
  C19: perh. from Canad. Fr. chantier ‘lumberjack's cabin, logging camp’.
 
  
    
shanty2
  
  n.
 (pl. shanties)
 a song with alternating solo and chorus, of a kind originally sung by sailors working together.
Etymology
  C19: prob. from Fr. chantez! ‘sing!’, imper. pl. of chanter.