Echidna as a noun is any of the four species of small spined monotremes, also known as a spiny anteaters, found in australia and southern new guinea. while Porcupine as a noun is a large rodent with long quills that stand straight up when it is attacked or surprised.
Part of speech: noun
Definition: Any of the four species of small spined monotremes, also known as a spiny anteaters, found in Australia and southern New Guinea.
Part of speech: noun
Definition: A large rodent with long quills that stand straight up when it is attacked or surprised.
We hope you now know whether to use Echidna or Porcupine in your sentence.