The best replacement for agile is waterfall.

The best alternatives to agile are rated as following:
★★★★★  waterfall
★★★★★  scrum
★★★  lean
★★  iterative
★★  rup
★★  epiphone
★★  waterfall project management
★  waterfall methodology
★  waterfall development
★  kanban
★  sdlc
★  extreme programming
★  cmmi
★  rad
★  xp
  traditional project management
  fragile
  scrum methodology
  lively
  iterative development
  ibanez
  prince2
  six sigma
  pmp
  epiphone les paul
  scrum methodologies
  waterfall method
  city mini
  spiral
  itil
  im
  waterfall methodologies
  lean methodologies
  waterfall differences
  agile
  addie
  nimble
  pmbok
  windchill
  baby jogger city mini
  agile plus
  b nimble
  b ready
  cmm
  waterfall model
  continuous integration
  plan driven
  pmi

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

Other search terms related to agile and their ratings are:
★★★★★ scrum
★★ jira
★ user stories
★ basecamp
★ pair programming
★ microsoft project
★ qa
prince2
estimates
portfolio management
rup
earned value
You have in mind a companion for agile and it is not yet here? Propose!



Google Trends

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agile
waterfall
scrum