trimmings vs accessory

trimmings and accessory both are nouns.

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

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

trimmings: the accessories that normally accompany (something or some activity)
accessory: a supplementary component that improves capability

Other hypernyms of trimmings include add-on, appurtenance, supplement.

trimmings (noun)	accessory (noun)
the accessories that normally accompany (something or some activity)	a supplementary component that improves capability
	clothing that is worn or carried, but not part of your main clothing
	someone who helps another person commit a crime

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