The best replacement for prototyping is sdlc.

The best alternatives to prototyping are rated as following:
★★★★★  sdlc
★★  rad
★★  waterfall
★★  throwaway prototyping
★★  wireframing
★★  rapid application development
★  3d printing
★  cnc
★  jad
★  emulation
★  evolutionary
★  addie
  life cycle
  traditional sdlc
  rapid prototyping
  physical prototyping
  evolutionary prototyping

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Speaking about prototyping, one probably shouldn't forget about sdlc.

Other search terms related to prototyping and their ratings are:
★★★★★ sdlc
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Google Trends

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prototyping
sdlc
rad