The best replacement for fip is npt.

The best alternatives to fip are rated as following:
★★★★★  npt
★★★★  mip
★★★  ips
★★★  fiv
★★  comp
★★  xfip
★★  era
★  flare
★  sofa
★  toxoplasmosis
★  compression
★  nom
★  fpt
  felv
  mip threads
  1\/2 ips
  od

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

Other search terms related to fip and their ratings are:
★★★★★ interferon
You have in mind a companion for fip and it is not yet here? Propose!



Google Trends

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fip
npt
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