class Arachnida vs superclass Chelicerata

class Arachnida and superclass Chelicerata both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Arachnida	Yes	No	No	No
superclass Chelicerata	Yes	No	No	No

class Arachnida (noun)	superclass Chelicerata (noun)
a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings	spiders, scorpions, horseshoe crabs