The best replacement for kitten is cat.

The best alternatives to kitten are rated as following:
★★★★★  cat
★★★★  puppy
★  lizard
★  cub
★  cougar
★  kitten
★  newborn
★  older cat
★  rottweiler
★  kitty
★  bunny
★  bani
★  female kitten
  starfire
  girl kitten
  doberman
  lizards
  ferret
  robotic dog toy & adult cat
  sugababes
  rescue cat
  boy kitten
  bearded dragon
  two lizards
  small cat

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

Other search terms related to kitten and their ratings are:
★★★★★ iguana
★★★ bearded dragon
★★★ mother cat
You have in mind a companion for kitten and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of kitten in all years. Click on graph for more.
kitten
cat
puppy