accessory vs clothing

accessory and clothing both are nouns.

Word	Noun	Adjective	Verb	Adverb
accessory	Yes	Yes	No	No
clothing	Yes	No	No	No

As nouns, clothing is a hypernym of accessory; that is, clothing is a word with a broader meaning than accessory:

accessory: clothing that is worn or carried, but not part of your main clothing
clothing: a covering designed to be worn on a person's body

Other hypernyms of accessory include article of clothing, habiliment, vesture, wear, wearable.

accessory (noun)	clothing (noun)
a supplementary component that improves capability	a covering designed to be worn on a person's body
clothing that is worn or carried, but not part of your main clothing
someone who helps another person commit a crime

accessory (adjective)	clothing (adjective)
furnishing added support
aiding and abetting in a crime