The best replacement for validation is qualification.

The best alternatives to validation are rated as following:
★★★★★  qualification
★★★★  verification
★  testing
★  calibration
★  verification fda
★  evaluation
★  verification of debt
★  debt verification
★  verification example
★  affirmation
  server side validation
  validity
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  field level validation
  commissioning
  authentication
  verification software
  confirmation
  design verification
  process qualification
  approval
  concurrent validation
  verification data
  data verification
  form level validation
  verification process

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

Other search terms related to validation and their ratings are:
★★★★★ knockout
★★★★★ form jquery
★★★★ jquery in php
★★★★ postback asp.net
★★★★ postback
★★★ form
★★★ javascript in asp.net
★★★ javascript in php
★ regular expression in javascript
★ jaxb
microsoft
xsd
You have in mind a companion for validation and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of validation in all years. Click on graph for more.
validation
qualification
verification