peripatus vs onychophoran

peripatus and onychophoran both are nouns.

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

As nouns, peripatus and onychophoran are synonyms defined as:

peripatus and onychophoran: any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms

Other synonyms of peripatus include velvet worm.

peripatus (noun)	onychophoran (noun)
any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms	any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms