Acinonyx jubatus and Big cat

Acinonyx jubatus noun - Long-legged spotted cat of Africa and southwestern Asia having nonretractile claws; the swiftest mammal; can be trained to run down game.

Big cat and Acinonyx jubatus are semantically related. In some cases you can use "Big cat" instead a noun phrase "Acinonyx jubatus".

Big cat noun - Any of several large cats typically able to roar and living in the wild.

Acinonyx jubatus and big cat are semantically related. Sometimes you can replace phrase "Acinonyx jubatus" with "Big cat", this phrases are similar.