The best replacement for spiral is helix.

The best alternatives to spiral are rated as following:
★★★★★  helix
★★★★  radial cleavage
★★★  regular perm
★★★  mastery math
★★  agile
★★  mastery
★★  waterfall
★  coil
★  elliptical galaxies
★  circles
★  scrum
★  c dough hook
★  helical
★  psylocke
★  waterfall model
  golden spiral
  waterfall methodology
  spin
  conventional ct
  planetary mixer

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

Other search terms related to spiral and their ratings are:
★★★★★ football
★★★ white circle icomania
curling iron
You have in mind a companion for spiral and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of spiral in all years. Click on graph for more.
spiral
helix
radial cleavage