The best replacement for horse is pony.

The best alternatives to horse are rated as following:
★★★★★  pony
★★★  mule
★★  donkey
★★  zebra
★  horse
★  frog
★  cow manure
★  man
★  bull
★  camel
★  thoroughbred
★  dog smarter
★  cow
  burro
  greyhound faster
  man race
  stallion
  joe boxer
  camel faster
  blood clot
  pancho villa
  surly cross check
  moose
  dvt
  quarter horse
  horses
  frog illusion
  lady
  car race
  paint horse
  18 men
  dog intelligence
  cob
  train heartbeat
  kj noons
  pinto
  donkey mule
  work horse

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

Other search terms related to horse and their ratings are:
★★★★★ rider
★★★ saddle
★ horseman
★ no name neil young
★ colic
jockey
You have in mind a companion for horse and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of horse in all years. Click on graph for more.
horse
pony
mule