fob vs adornment

fob and adornment both are nouns.

Word	Noun	Adjective	Verb	Adverb
fob	Yes	No	Yes	No
adornment	Yes	No	No	No

As nouns, adornment is a hypernym of fob; that is, adornment is a word with a broader meaning than fob:

fob: an adornment that hangs from a watch chain
adornment: a decoration of color or interest that is added to relieve plainness

fob (noun)	adornment (noun)
short chain or ribbon attaching a pocket watch to a man's vest	the action of decorating yourself with something colorful and interesting
an adornment that hangs from a watch chain	a decoration of color or interest that is added to relieve plainness
a vest pocket to hold a pocket watch

fob (verb)	adornment (verb)
deceive somebody