foible vs flaw

foible and flaw both are nouns.

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

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

foible (noun)	flaw (noun)
the weaker part of a sword's blade from the forte to the tip	an imperfection in an object or machine
a behavioral attribute that is distinctive and peculiar to an individual	defect or weakness in a person's character
a minor flaw or shortcoming in character or behavior.	an imperfection in a plan or theory or legal document that causes it to fail or that reduces its effectiveness

foible (verb)	flaw (verb)
	add a flaw or blemish to; make imperfect or defective