"lines" - key terms from Wikipedia

absorption lines
air lines
air lines	flight
armistice lines
assault lines
bass lines
between the lines
bit lines
blue lines
bus lines
carnival cruise lines
cell lines
contour lines
cruise lines
defensive lines
delta air lines
eastern air lines
emission lines
field lines
foul lines
german lines
greyhound lines
grid lines
japan air lines
korean air lines
leased lines
ley lines
lines
lines	of code
magnetic field lines
nazca lines
overhead lines
parallel lines
phone lines
power lines
product lines
rail lines
railroad lines
railway lines
scan lines
scan lines	per inch
spectral lines
stem cell lines
story lines
straight lines
subway lines
supply lines
swiss international air lines
transmission lines
two lines