The best replacement for lines is cell phones.

The best alternatives to lines are rated as following:
★★★★★  cell phones
★★★★★  intersecting lines
★★★★  bumps
★★★  rays
★★★  shute
★★★  got to give it up
★★★  trunks
★★★  object lines
★★  marvin gaye
★  central lines
★  soft lines
★  segments are parallel
★  stripes
★  home equity loans
★  dimples
★  no tan lines
★  pvc
★  analog phone lines
★  digital telephone lines
★  perpendicular lines
★  phone lines
★  copper
★  plastic
★  admitted
★  peripheral lines
★  uvc
★  4000 characters
★  normal lines
  royal caribbean
  tectonic plates
  carnival cruise line
  working lines
  line segments
  canopy tours
  parallel

Your alternative for lines is not listed? Suggest!
Speaking about lines, one probably shouldn't forget about fractions.

Other search terms related to lines and their ratings are:
★★★★★ fractions
★★★★★ no transversal
★★★ non perpendicular transversal
★★ perpendicular transversal
★ transversal
You have in mind a companion for lines and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lines in all years. Click on graph for more.
lines
cell phones
intersecting lines