biped vs animal

biped and animal both are nouns.

Word	Noun	Adjective	Verb	Adverb
biped	Yes	Yes	No	No
animal	Yes	Yes	No	No

As nouns, animal is a hypernym of biped; that is, animal is a word with a broader meaning than biped:

Other hypernyms of biped include animate being, beast, brute, creature, fauna.

biped (noun)	animal (noun)
an animal with two feet	a living organism characterized by voluntary movement

biped (adjective)	animal (adjective)
having two feet	marked by the appetites and passions of the body