The best replacement for fu is karate.

The best alternatives to fu are rated as following:
★★★★★  karate
★★★  muay thai
★★★  tae kwon do
★★★  mma
★★  taekwondo
★★  jiu jitsu
★★  attitude adjustment
★★  aikido
★  hu
★  vixion
★  boxing
★  el dragon nest
★  karate video
★  karate which is better
★  krav maga
★  jujitsu
★  karate which is best
★  fu
★  rx king
★  ebdon
★  tai chi
  kung fu
  judo
  kickboxing
  elsword
  cs1
  ninjutsu
  yoga
  new vixion
  rko
  sumo
  melai
  shotokan karate
  thai boxing
  thai
  mixed martial arts
  ding
  trump
  shotokan
  other martial arts
  wing chun
  jupiter mx
  karate fight
  gung fu
  tae kwon do video

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

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



Google Trends

Scale is based on the average worldwide traffic of fu in all years. Click on graph for more.
fu
karate
muay thai