foible vs mannerism

foible and mannerism both are nouns.

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

As nouns, foible and mannerism are synonyms defined as:

foible and mannerism: a behavioral attribute that is distinctive and peculiar to an individual

Other synonyms of foible include idiosyncrasy.

foible (noun)	mannerism (noun)
the weaker part of a sword's blade from the forte to the tip	a deliberate pretense or exaggerated display
a behavioral attribute that is distinctive and peculiar to an individual	a behavioral attribute that is distinctive and peculiar to an individual
a minor flaw or shortcoming in character or behavior.