speciality vs mannerism

speciality and mannerism both are nouns.

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

As nouns, mannerism is a hyponym of speciality; that is, mannerism is a word with a more specific, narrower meaning than speciality:

speciality: a distinguishing trait
mannerism: a behavioral attribute that is distinctive and peculiar to an individual

Other hyponyms of speciality include foible, idiosyncrasy.

speciality (noun)	mannerism (noun)
the special line of work you have adopted as your career	a deliberate pretense or exaggerated display
a distinguishing trait	a behavioral attribute that is distinctive and peculiar to an individual
an asset of special worth or utility