peripatus vs arthropod

peripatus and arthropod both are nouns.

Word	Noun	Adjective	Verb	Adverb
peripatus	Yes	No	No	No
arthropod	Yes	No	No	No

As nouns, arthropod is a hypernym of peripatus; that is, arthropod is a word with a broader meaning than peripatus:

peripatus: any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms
arthropod: invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin

peripatus (noun)	arthropod (noun)
any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms	invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin