Synonyms for Main ingredient:

• n.

  •cornerstone (noun)
  • linchpin,
  • keystone,
  • essential,
  • foundation,
  • mainsprings,
  • pillar,
  • mainstay,
  • base,
  • keystones,
  • linchpins,
  • mainspring,
  • key element,
  • anchor.

• Other synonyms:

  •Other relevant words:
  • point of departure,
  • essence.