foible vs peculiarity

foible and peculiarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
foible	Yes	No	No	No
peculiarity	Yes	No	No	No

As nouns, peculiarity is a hypernym of foible; that is, peculiarity is a word with a broader meaning than foible:

foible: a behavioral attribute that is distinctive and peculiar to an individual
peculiarity: a distinguishing trait

Other hypernyms of foible include distinctiveness, speciality, specialness, specialty.

foible (noun)	peculiarity (noun)
the weaker part of a sword's blade from the forte to the tip	something unusual -- perhaps worthy of collecting
a behavioral attribute that is distinctive and peculiar to an individual	a distinguishing trait
a minor flaw or shortcoming in character or behavior.	an odd or unusual characteristic