The best replacement for rebuild is remodel.

The best alternatives to rebuild are rated as following:
★★★★★  remodel
★★★★★  replace transmission
★★★★  replace engine
★★★  reorganize index
★★★  new engine
★★★  reorganize indexes
★★  build
★★  remanufactured
★★  renovate
★★  used transmission
★★  buy new engine
★★  reorganize
★★  buy new transmission
★★  rebuild
★  used engine
★  buy used transmission
★  crate engine
★  clean and build
★  overhaul
★  remanufactured engine
★  reindex
★  swap engine
★  crate
★  re-build
  rebuilt
  reorg
  coalesce index
  crate motor
  original evangelion
  build visual studio
  overhaul engine
  replace a transmission
  new transmission

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Speaking about rebuild, one probably shouldn't forget about online on.

Other search terms related to rebuild and their ratings are:
★★★★★ online on
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Google Trends

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rebuild
remodel
replace transmission