accoutrement vs key fob

accoutrement and key fob both are nouns.

Word	Noun	Adjective	Verb	Adverb
accoutrement	Yes	No	No	No
key fob	Yes	No	No	No

As nouns, key fob is a hyponym of accoutrement; that is, key fob is a word with a more specific, narrower meaning than accoutrement:

accoutrement: clothing that is worn or carried, but not part of your main clothing
key fob: A small object fastened to a key chain or key ring and designed to be comfortably grasped.

Other hyponyms of accoutrement include belt, furnishing, trappings, keyfob.

accoutrement (noun)	key fob (noun)
clothing that is worn or carried, but not part of your main clothing	A small object fastened to a key chain or key ring and designed to be comfortably grasped.